Volume 42 Number 6 February 2012 Page 1

AGS Luncheon

Date & Time: Feb. 16th, 11:30 am 1:00 pm

Program: Application of LiDAR Technology

Speaker(s): Peter P. Flaig

Place: BP Energy Center Reservations: Please make your reservation before noon Tuesday, Feb. 14th, 2012.

Cost: Seminar only, no meal: Free

Reserve a box lunch: $15

Reserve a hot lunch: $20

Lunch with no reservation: On an as-available basis only

E-mail reservations: vp@alaskageology.org

Or phone (907) 644-4429

For more information: visit the AGS website:

www.alaskageology.org

Peter P. Flaig1, Dolores A. van der Kolk1, Richard Garrard2, Darrin Burton1, and Lesli Wood1,

1 University of Texas at Austin, bureau of Economic Geology, Quantitative Clastics Laboratory 2 FEX L.P., Anchorage, Alaska

LiDAR (Light Detection And Ranging) is a non-invasive, remote sensing technique that allows for rapid collection of large, 3-dimensional outcrop datasets with intrinsic qualities that include quantitative relationships and potential proxies for lithology. LiDAR is principally RADAR that uses light rather than sound waves to collect spatially referenced point clouds at ~2500 samples per second at a range of up to 800 m (ground-based LiDAR). Point clouds are rendered and analyzed in InnovMetric s 3-D metrology software Polyworks. The Quantitative Clastics Laboratory at the Bureau of Economic Geology, University of Texas at Austin curates a LiDAR Legacy dataset that now includes a recent survey recorded from Sagwon Bluffs along the Sagavanirktok River on the North Slope of Alaska.

The Paleocene Prince Creek Formation (PCF) is exposed at Sagwon Bluffs in 40-120 m-high, 11 km-long cliffs that provide an ideal outcrop analogue for a shallow North Slope petroleum reservoir. Coastal-plain facies of the PCF include conglomerate, sandstone, organic siltstone, carbonaceous shale, mudstone, and coal deposited in meandering streams, lakes, swamps, and on levees, crevasse splays, and floodplains. In outcrop, isolated channel-sands are encased in thick, muddy, organic-rich floodplain and lacustrine facies, creating potential stratigraphic traps. Alluvial architectures and thick coals suggest high subsidence/accommodation in this part of the basin during the Paleocene.

Laterally extensive, near-vertical exposures at Sagwon Bluffs make detailed outcrop investigations challenging; however, spatial relationships inherent to

The Application of LiDAR (Light Detection And Ranging) Technology to Outcrop Geology

With an Example From Sagwon Bluffs on the North Slope of Alaska

Volume 42 Number 6 February 2012 Page 2

the LiDAR dataset allow for precise measurement of channel length, height, and cross-sectional area with decimeter scale accuracy, even in inaccessible vertical cliffs. The intensity attribute of the data (power returned / power emitted) coupled with ground-truthing of facies can be used to identify lithologies. Statistical analyses of intensity returns from Sagwon Bluffs indicate a roughly trimodal distribution. Ground-truthing suggests that each mode represents a

separate, unique lithology: sandstone, mudstone, or coal. Cumulative probability of lithology vs. intensity plots indicate that intensities of 255-180 represent sandstone, 180-95 represent mudstone, and 95-0 represent coal.

Simulated, pseudo-gamma ray logs were produced for 14 vertical data slices from intensity vs. height plots at locations lacking scree and containing clean outcrop. Pseudo-gamma ray logs are intended to mimic the subsurface gamma-ray tool response to changing lithologies. Model net:gross was calculated for each slice and provided an improved estimate relative to calculated net:gross from stratigraphic columns. Rare North Slope outcrop belts such as Sagwon Bluffs located near known hydrocarbon accumulations offer a glimpse into facies, alluvial architecture, sandbody geometries, and stacking pattern that is difficult to resolve from seismic and core alone. Analysis of LiDAR datasets from these outcrops will enhance geospatial models, improve net:gross calculations, reduce risk, and increase production.

Fig. 2. (A) Color photograph versus (B) LiDAR intensity attribute image of fluvial sandstone, lacustrine-palustrine mudstone, and coal at Sagwon Bluffs

Fig. 1. Dallas Dunlap, Research Science Associate at UT-Austin, calibrates the Ilris 3-D LiDAR scanner at Sagwon Bluffs

Fig. 3. Pseudo-gamma ray log produced from Sagwon Bluffs LiDAR intensity returns

Volume 42 Number 6 February 2012 Page 3

About the Speaker: Pete was born in Milwaukee during a blizzard on December 28th 1968, the same day Apollo 8 astronauts Frank Borman, James Lovell, and William Anders (the first humans ever to see the far side of the moon) were plucked from their space capsule floating in the South Pacific. Pete began his career as a professional photographer and custom printer. In 2002 he earned a B.S. in Geology from the University of Wisconsin-Milwaukee (UWM). In 2003 Pete was offered a unique opportunity to join a field team in the central Transantarctic Mountains of Antarctica. During the 2003-2004 Antarctic field season Pete examined a Permian through Triassic alluvial succession to identify the impetus behind changing facies, flora, fauna, fluvial style, accommodation, and stacking pattern across the Permian-Triassic boundary in the Beardmore Glacier Region of Antarctica. He earned his M.S. from UWM in 2005. In 2005 a phone call from Paul McCarthy at the University of Alaska-Fairbanks (UAF) changed his life. Pete joined a team of scientists investigating the dinosaur-bearing Prince Creek Formation, a Cretaceous fluvial-deltaic succession exposed along the Colville River on the North Slope of Alaska. Pete s role as a sedimentologist was to reconstruct the Cretaceous coastal-plain of Arctic Alaska, placing the dinosaurs in a paleoenvironmental context. Pete lived in Fairbanks for 4 years (2005-2009) and attended UAF where he met his wife Dolores van der Kolk. During this time he also conducted an intern project for FEX/Talisman in Anchorage involving the integration of surface and sub-surface data for the Late Cretaceous to Early Tertiary of the North Slope State lands. He received his Ph.D. from UAF in 2010.

Pete moved to Austin, Texas in 2009 to accept a Postdoctoral Fellowship at the Jackson School of Geosciences, University of Texas at Austin (UT-Austin). Pete s postdoctoral work included continuing research on North Slope fluvial-deltaic and shallow marine systems, investigations of other Cretaceous Western Interior Seaway deposits, and examination and expansion of the LiDAR Legacy database stored at the Bureau of Economic Geology (BEG). In 2009 Pete and Dolores acquired the first ground-based LiDAR dataset in northern Alaska at Sagwon Bluffs, adding to sedimentologic investigations from previous field seasons there. Pete joined a team of scientists in 2010-2011 for his second Antarctic field season in the central Transantarctic Mountains. Pete and Steve Hasiotis from the University of Kansas collaborated and expanded on previous work, examining facies and trace fossil assemblages from the Devonian through the Jurassic with a goal of reconstructing ancient Antarctic ecosystems. Pete recently accepted a Research Associate position as a sedimentologist-stratigrapher at the BEG, UT-Austin where he is the lead scientist on fluvial-deltaic studies at the Quantitative Clastics Laboratory (QCL). Pete s current research, in conjunction with Dolores van der Kolk s Ph.D research, involves understanding facies-changes, ichnofacies variations, and the interfingering relationship between the continental Prince Creek Formation and shallow marine Schrader Bluff Formation on the North Slope. This summer will mark his 10th field-program on the Slope. Pete also provides expertise and advises graduate students on QCL consortium company projects and is involved in planning for the next deep field Antarctic camp in the Transantarctic Mountains of interior Antarctica.

From the President s Desk

As I announced at January s luncheon Steve Wright, the President-Elect of the Alaska Geological Society, will be leaving Alaska to accept a new position with Chevron in the lower 48. Consequently the AGS board is looking for volunteers to step into Steve s position. If you have an avid interest in Alaskan geology, like working with people, and have spare time to donate to the society, please consider stepping up to fill the vacancy. Anyone interested can contact me at ken.helmold@alaska.gov .

AGS currently stores publications and miscellaneous material at the Bayview core facility run by ConocoPhillips. The facility is scheduled for closure later this year so the board is looking for an alternate site to permanently store this material. If you know of

an appropriate location, hopefully somewhere in Anchorage with easy access, please contact Peter Johnson, chairman of the publication committee, at peter.johnson@boemre.gov .

This month s luncheon presentation by Peter Flaig of the Texas Bureau of Economic Geology will be on The application of LiDAR (Light Detection And

Ranging) technology to outcrop geology with an example from Sagwon Bluffs on the North Slope of Alaska . This new technology promises revolutionize the manner in which outcrops are analyzed, so come early to get a good seat.

- Ken

Pete and Dolores, November 2011

Volume 42 Number 6 February 2012 Page 4

ALASKA FOSSIL OF THE MONTH

MONOTIS (PACIMONOTIS) SUBCIRCULARIS GABB, 1864

by Robert B. Blodgett

This month s selection for the Alaska Fossil of the Month is the widespread index fossil bivalve, Monotis (Pacimonotis) subcircularis Gabb, which has long been appearing in faunal lists from Upper Triassic strata of Alaska. Not only is this species widespread and abundant throughout rocks of this age in Alaska (see Figs. 1-4), making it invaluable in geological mapping, but it is also commonly found in mass occurrences in many potentially significant source beds for petroleum such as the Shublik Formation on the North Slope, as well as the Kamishak Formation on the upper Alaska Peninsula. The species was named by William M. Gabb (1839-1878), a well-known 19

th Century geologist, who was a pioneer in describing many of California s Mesozoic and Cenozoic age fossils.

The species is the most widespread and the commonest species among North American representatives of the genus Monotis. It stratigraphic occurrence appears to limited to the lower part (Cordilleranus Zone) the upper Norian Stage. The Norian, which comprises the medial stage of the Upper Triassic, ranges from 216.5

2.0 to 203.6

1.5 million years ago. This species had a paleolatitudinally wide geographic distribution along the western margin of the Americas, extending in the north from the Canadian Arctic Islands south to western margin of South America as far south as Chile. It occurs in Alaska both on the craton in east-central Alaska, as well as in numerous accreted terranes (or subterranes) throughout the rest of the state. According to Silberling and others (1997) these included the following: North Slope, Endicott Mountains, De Long Mountains, Nixon Fork, Nyac?, Togiak, Chulitna, Sustina, Nenana, Stikinia, Wrangellia, Peninsular, and Alexander terranes (or subterranes). The widespread character of monotid bivalves is thought be the result of a presumed attached-floating mode of

life (assumed by most, but not all paleontologists), attached to objects such as seaweeds.

For most information on this useful I recommend the following papers provided in the References cited below.

REFERENCES

Blodgett, R.B., 2008, Paleontology and stratigraphy of the Upper Triassic Kamiskak Formation in the Puale Bay-Cape Kekurnoi-Alinchak Bay area, Karluk C-4 and C-5 Quadrangle, Alaska Peninsula, p. 131-160, in Reifenstuhl, R.R., and Decker, P.L., eds., Bristol Bay--Alaska Peninsula region, Overview of 2004--2007 Geologic Research: Alaska Division of Geological & Geophysical Surveys Report of Investigations 2008-1.

Blodgett, R.B., 2009, Report on day trip (5/16/07) to visit Mesozoic rocks exposed in Port Graham and near Seldovia, southern Kenai Peninsula, p. 109-116, in LePain, D.L., Preliminary results of recent geologic investigations in the Homer-Kachemak Bay area, Cook Inlet Basin: Progress during the 2006-2007 field season: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2009-8C, p. 109-116.

Gabb, W.M., 1864, Description of the Triassic fossils of California. California Geological Survey, Paleontology, volume 1, p. 19-35.

Grant-Mackie, J.A., and Silberling, N.J., 1990, New data on the Upper Triassic bivalve Monotis in North America, and the new subgenus Pacimonotis: Journal of Paleontology, v. 64, p. 240-254.

Martin, G.C., 1916, Triassic rocks of Alaska. Bulletin of the Geological Society of America, v. 27, p. 685-718.

Photo by James Buchanan Can you name this rock formation?

Volume 42 Number 6 February 2012 Page 5

Silberling, N.J., 1963, Field guide to halobiid and monotid pelecypods of the Alaskan Triassic. U.S. Geological Survey Open-File Report 63-119, 10 p., 6 pls.

Silberling, N. J., 1985, Biogeographic significance of the Upper Triassic bivalve Monotis in circum-Pacific accreted terranes, in Howell, D. G., ed., Tectonostratigraphic Terranes of the Circum-Pacific Region: Circum-Pacific Council for Energy and Mineral Resources Earth Sciences Series No. 1, p. 63-70.

Silberling, N.J., Grant-Mackie, J.A., and Nichols, K.M., 1997, The Late Triassic bivalve Monotis in accreted terranes of Alaska: U.S. Geological Survey Bulletin 2151, 21 p.

Stanton, T.W., and Martin, G.C., 1905, Mesozoic section on Cook Inlet and Alaska Peninsula: Bulletin of the Geological Society of America, v. 16, p. 391-410.

Figure 1. Bedding plane in lower part of Kamishak Formation at Puale Bay, east (Pacific) side of the upper Alaska Peninsula, entirely covered with Monotis (Pacimonotis) subcircularis (from Blodgett, 2008).

Figure 2. Line drawing for a specimen of Monotis (Pacimonotis) subcircularis from Puale Bay (referred to at the time of publication as Cold Bay ) on the Alaska Peninsula (from Martin, 1916).

Figure 3. Photo of fragmentary specimens of Monotis (Pacimonotis) subcircularis found in folded argillite on west side of Port Graham, Kenai Peninsula, south-central Alaska (photo from Blodgett, 2009, provided to him by Andrew Caruthers of University of British Columbia, Vancouver, B.C.).

Volume 42 Number 6 February 2012 Page 6

Figure 4. Bedding surface covered with Monotis (Pacimonotis) subcircularis from the west side of the Killik River, northern Alaska (from Silberling and others, 1997, Pl. 7, fig. 5).

A TRIBUTE TO NORMAN J. SILBERLING

(1928-2011)

by Robert B. Blodgett

Norman J. Silberling

This note honors Norman J. Silberling, an outstanding geologist who has done much to further the knowledge of Alaskan and Cordilleran tectonics, as well as Triassic paleontology. Norm was born November 28, 1928 in Oakland, California and received a Ph.D. in geology at Stanford University, where he was a student of Si Mueller. Norm served in the U.S. Navy during the Korean War and received two combat stars. His career included work at both the Branch of Paleontology and Stratigraphy of the U.S. Geological Survey and on the faculty of Stanford University. He was pre-eminent for his work on Triassic ammonoids and flat-clams (including monotids, Halobia, and Daonella), Triassic stratigraphy of the western U.S., as well as in structural geology, where he was one of the early leading proponents of terrane analysis of the western North American Cordillera. Together with Davy Jones, a Cretaceous paleontological specialist with the USGS, they named the vast majority of tectonostratigraphic terranes recognized in Alaska. Norm passed away on September 27, 2011 in Lakewood, Colorado. He is survived by his widow, Kathyrn M. Nichols, also a geologist and long-standing colleague. He will be sorely missed by a numbers of paleontologists who have vastly benefited from his sage and fatherly advice, including myself, George Stanley, Jr., Christopher McRoberts, Michael Sandy, Spencer Lucas, and Mike Orchard, and numerous other Triassophiles.

Volume 42 Number 6 February 2012 Page 7

BIBLIOGRAPHY OF SILBERING PAPERS RELATING TO ALASKAN GEOLOGY Silberling, N.J., 1963, Field guide to halobiid and monotid pelecypods of the Alaskan Triassic: U.S. Geological Survey Open-File

Report 63-119, 10 p., 6 pls. Silberling, N.J., and Patton, W.W., Jr., 1964, Triassic rocks of Brooks Range; in Geological Survey Research 1964, Chapt. A.:

U.S. Geological Survey Professional Paper 501-A, p. A116. Silberling, N.J., 1965, New zonation of Triassic Shublik Formation, Alaska, in Geological Survey Research 1965, Chapt. A.: U.S.

Geological Survey Professional Paper 525-A, p. A123. Silberling, N.J., and Tozer, E.T., 1968, Biostratigraphic classification of the marine Triassic in North America. Geological

Society of America Special Paper 110, 63 p. Armstrong, A.K., MacKevett, E.M., Jr., Jr., and Silberling, N.J., 1969, The Chitistone and Nizina Limestones of part of the

southern Wrangell Mountains a preliminary report stressing carbonate petrography and depositional environments: U.S. Geological Survey Professional Paper 650-D, p. D49-D62.

Silberling, N.J., 1971, Geologic events during Permian-Triassic time along the Pacific Margin of the United States (Abs.): Bulletin of the Canadian Society of Petroleum Geology, v. 19, p. 355.

Silberling, N.J., 1973, Geologic events during Permian-Triassic time along the Pacific Margin of the United States, in Logan, A., and Hills, L.V., eds., The Permian and Triassic Systems and their mutual boundary: Canadian Society of Petroleum Geologists Memoir 2, p. 345-362.

Jones, D.L., Silberling, N.J., and Hillhouse, John, 1977, Wrangellia a displaced terrane in northwestern North America: Canadian Journal of Earth Sciences, v. 14, no. 11, p. 2565-2577.

Silberling, N.M., Jones, D.L., Scejtey, Bela, and Nelson, W.H., 1978, Interpretive bedrock geologic map of the Upper Chulitna district, Healy A-6 quadrangle, Alaska Range, Alaska: U.S. Geological Survey Open-File Report 78-545.

Jones, D.L., Silberling, N.J., and Hillhouse, J.W., 1978, Microplate tectonics of Alaska Significance for the Mesozoic history of the Pacific Coast of North America, in McDougall, K.A., and Howell, D.G., eds., Mesozoic paleogeography of the western United States: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium 2, p. 71-74.

Jones, D. L., Silberling, N. J., 1979, Mesozoic stratigraphy the key to tectonic analysis of southern and central Alaska: U.S. Geological Survey Open-File Rept. 79-1200, 37 p.

Jones, D. L., and Silberling, N. J., 1979, Mesozoic accretionary tectonics of southern and central Alaska: Geological Society of America Abstracts with Programs, v. 11, p. 452.

Silberling, N. J., Richter, D. H., and Jones, D. L., 1979, Recognition of Wrangellia in the Talkeetna and Clearwater Mountains, northcentral Alaska: Geological Society of America Abstracts with Programs, v. 11, p. 517.

Nichols, K. M., and Silberling, N. J., 1979, Early Triassic (Smithian) ammonites of paleoequatorial affinity from the Chulitna terrane, south-central Alaska: U.S. Geological Professional Paper 1121-B, p. B1-B5, 3 pls.

Jones, D. L., Silberling, N. J., and others 1980, Age and structural significance of ophiolite and adjoining rocks in the Upper Chulitna district, south-central Alaska: USGS Professional Paper 1121-A, 21 p., 2 pls.

Plafker, George, Hudson, Travis, and Silberling, N. J., 1980, Late Triassic fossils from a sequence of volcanic and sedimentary rocks on the Chilkat Peninsula, SE Alaska: U.S. Geological Survey Circular 804-B, p. 107-110, fig. 49.

Silberling, N. J., and Jones, D. L., 1980, Mesozoic accretionary tectonics of Alaska (abs.): American Association of Petroleum Geologists Bulletin, v. 64, p. 784.

Coney, P. J., Silberling, N. J., and Jones, D. L., 1980, Accretionary tectonic styles in the Alaska Range (abs.): EOS, v. 61, p. 1114.

Jones, D. L., Silberling, N. J., Gilbert, Wyatt, and Coney, P. J., 1980, Age, character, and distribution of accreted terranes in the central Alaska Range, south-central Alaska (abs.): EOS, v. 61, p. 114.

Silberling, N. J., Richter, D. H., and Jones, D. L., 1981, Recognition of Wrangellia in the Clearwater Mountains and vicinity, south-central Alaska, p. B51-B55, in Albert, N. R. D., and Hudson, Travis, eds., The United States Geological Survey in Alaska: Accomplishments during 1979: U.S. Geological Survey Circular 823-B, p. B51-B55.

Coney, P. J., Silberling, N. J., Jones, D. L., and Richter, D. H., 1981, Structural relations along the leading edge of Wangellia in the Clearwater Mountains, Alaska, p. B56-B59, in Albert, N. R. D., and Hudson, Travis, eds., The United States Geological Survey in Alaska: Accomplishments during 1979: U.S. Geological Survey Circular 823-B.

Jones, D. L., Silberling, N. J., Wardlaw, B. R., and Richter, D. H., 1981, Revised ages of Paleozoic and Mesozoic rocks in the Talkeetna quadrangle, south-central Alaska, p. B46-B49, in Albert, N. R. D., and Hudson, Travis, eds., The United States Geological Survey in Alaska: Accomplishments during 1979: U.S. Geological Survey Circular 823-B.

Jones, D. L., Silberling, N. J., Berg, H. C., and Plafker, George, 1981, Tectonostratigraphic terrane map of Alaska: U.S. Geol. Survey Open-File Rept. 81-792, map, expl. sheet, and 20 p. text.

Silberling, N. J., Richter, D. H., Jones, D. L., and Coney, P. C., 1981, Geologic map of the bedrock parts of the Healy A-1 quadrangle south of the Talkeetna-Broxson Gulch fault system, Clearwater Mountains, Alaska: U.S. Geol. Survey Open-File Report 81-1288.

Volume 42 Number 6 February 2012 Page 8

Jones, D. L., Silberling, N. J., Berg, H. C., and Plafker, George, 1982, Tectonostratigraphic terrane map of Alaska, p. 105, in Coonrad, W. L., and Elliott, R. L., eds., The United States Geological Survey in Alaska: Accomplishments during 1980: U.S. Geological Survey Circular 844.

Silberling, N. J., Wardlaw, B. R., and Berg, H. C., 1982, New paleontologic age determinations from the Taku terrane, Ketchikan area, southeast Alaska, op cit. p. 117-119, in Coonrad, W. L., and Elliott, R. L., eds., The United States Geological Survey in Alaska: Accomplishments during 1980: U.S. Geological Survey Circular 844.

Jones, D. L., Silberling, N. J., Gilbert, W. G., and Coney, P. J., 1982, Character, distribution, and tectonic significance of accretionary terranes in the central Alaskan Range: Jour. Geophysical Research, v. 87, no. B5, p. 3709-3717.

Jones, D. L., and Silberling, N. J., 1982, Mesozoic stratigraphy the key to tectonic analysis of southern and central Alaska, in Leviton, A., et al., eds., Frontiers of geological exploration of western North America: American Assoc. Advancement of Science, Pacific Div., Symposium, p. 139-153.

Jones, D. L., Silberling, N. J., and Coney, P. J., 1982, Timing of major accretionary events in Alaska (Abstract): Eos, v. 63, no. 45, p. 913-914.

Jones, D. L., and Silberling, N. J., 1982, Stratigraphic analysis of accreted terranes in the cordillera of western North America (Abstract): Geological Society of America Abstracts with Programs, v. 14, p. 523.

Coney, P. J., Silberling, N. J., and Jones, D. L., 1983, Oceanic crustal telescoping and the growth of continents: accretionary tectonics in Alaska (Abstract): Geological Society of America Abstracts with Programs, v. 15, no. 5, p. 427.

Silberling, N. J., and Jones, D. L., 1983, Paleontologic evidence for northward displacement of Mesozoic rocks in accreted terranes of the western Cordillera (Abstract): Geological Association of Canada, Program with Abstracts v. 8, p. A62.

Jones, D. L., and Silberling, N. J., 1983, Paleobiogeographic significance of Circum-Pacific allochtonous terranes (Abstract): Bulletin of Marine Science, v. 33, p. 779.

Jones, D. L., Silberling, N. J., and Coney, P. J., 1983, Interpretive bedrock geologic map of the Mount McKinley region and Tectonostratigraphic map of the Mt. McKinley region: U.S. Geological Survey Open-File Report 83-11, 2 sheets.

Jones, D. L., Silberling, N. J., Chapman, R. M., and Coney, P. J., 1984, New ages of radiolarian cherts from the Rampart district, east-central Alaska, p. 39-43, in Coonrad, W. L., and Elliott, R. L., eds., The United States Geological Survey in Alaska: Accomplishments during 1981: U.S.Geological Survey Circular 868.

Silberling, N. J., and Jones, D. L., editors, 1984, Lithotectonic terrane maps of the North American Cordillera: U.S. Geological Survey Open-File Report 84-523, 104 p. text, 4 map sheets at 1:2,500,000.

Jones, D. L., Silberling, N. J., Coney, P.J., and Plafker, George, 1984, Lithotectonic terrane map of Alaska (west of the 141st Meridian) Part A, in Silberling, N. J., and Jones, D. L., eds., Lithotectonic terrane map of the North American Cordillera: U.S. Geological Survey Open-File Report 84-523, p. A1-A12, map sheet.

Silberling, N. J., 1985, Biogeographic significance of the Upper Triassic bivalve Monotis in Circum-Pacific accreted terranes, in Howell, D. G., ed., Tectonostratigraphic terranes of the Circum-Pacific region: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, no. 1, p. 63-70.

Nokleberg, W. J., Jones, D. L., and Silberling, N. J., 1985, Origin, migration, and accretion of the Maclaren and Wrangellia terranes, eastern Alaska Range, Alaska: Geological Society of America Bulletin, v. 96, p. 1251-1270.

Jones, D. L., Silberling, N. J., and Coney, P. J., 1986, Collision tectonics in the Cordillera of western N. America: examples from Alaska,in Coward, M. P., and Riess, A. C., eds., Collision tectonics: Geological Society (of London) Special Publication No. 19, p. 367-387.

Silberling, N. J., and Jones, D. L., editors, 1987, Lithotectonic terrane map of (A) Alaska (west of the 141st Meridian), (B) western Canada and southeastern Alaska, (C) western conterminous United States, and (D) Mexico (west of the 91st Meridian): U.S. Geological Survey Miscellaneous Field Studies, Maps MF-1874-A, -B, -C, and -D.

Jones, D. L., Silberling, N. J., Coney, P. J., and Plafker, George, 1987, Lithotectonic terrane map of Alaska (west of the 141st Meridian):U.S. Geological Survey Miscellaneous Field Studies, Map MF-1874-A.

Dutro, J. T., Jr., and Silberling, N. J., 1988, Megafossil biostratigraphy of some deep test wells, NPRA, northern Alaska, in Gryc, George, ed., Geology and exploration of the National Petroleum Reserve in Alaska, 1974 to 1982: U.S. Geological Survey Professional Paper 1399, p. 667-675, pls. 30.1-30.4.

Plafker, George, Blome, C. D., and Silberling, N. J., 1989, Reinterpretation of lower Mesozoic rocks on the Chilkat Peninsulacloser ties with Wrangellia: Geology, v. 17, p. 3-6.

Grant-Mackie, J. A., and Silberling, N. J., 1990, New data on the Upper Triassic bivalve Monotis in North America, and the new subgenus Pacimonotis: Journal of Paleontology, v. 64, p. 240-254.

Silberling, N. J., Jones, D. L., Monger, J. W. H., and Coney, P. J., 1992, Lithotectonic terrane map of the North American Cordillera: U.S. Geological Survey Map I-2176, scale 1:5,000,000.

Silberling, N.J., Jones, D.L., Coney, P.J., Berg, H.C., and Plafker, G., 1994, Lithotectonic terrane map of Alaska, in Plafker, G., and Berg, H.C., eds., The geology of Alaska: Boulder, Colorado, Geological Society of America, The Geology of North America, v. G1, pl. 3, scale 1:2,500,000.

Silberling, N.J., Grant-Mackie, J.A., and Nichols, K.M., 1997, The Upper Triassic bivalve Monotis in accreted terranes of Alaska: U.S.Geological Survey Bulletin 2115, 21 p., 11 pls.

Volume 42 Number 6 February 2012 Page 9

The Alaska Geological Society

LUNCHEON SCHEDULE 2011 - 2012

Updates on the web at: http://www.alaskageology.org

September 2011 Thursday, Sept. 15th, Paul Decker, DNR

Source-Reservoired Oil Resources, North Slope Alaska

October 2011 Thursday, Oct. 20th, Kristine Crossen and David Yesner, UAA, Youngest Mammoths in America: 5700 Year Old Mammoth Remains from Qagnax Cave, Pribilof Islands, Alaska

November 2011 Thursday, Nov. 17th, Tom Homza, Shell Exploration & Production, Toward an Integrated Model for the Canada Basin: Implications for North Alaska

December 2011 Thursday, Dec. 8th Tad Smith (SEG 2011 Honorary Lecturer), Apache Corporation, Practical Seismic Petrophysics: The Effective Use of Log Data for Seismic Analysis (Joint meeting AGS / GSA)

January 2012 Thursday, Jan 19th Sue Karl, U.S. Geological Survey: Rare Earth Element Deposits, Bokan Mt., SE Alaska

February 2012 Thursday, Feb. 16th Peter Flaig, UT-Austin BEG, Application of LiDAR

March 2012 Thursday, Mar. 15th Rodney Graham (AAPG Distinguished Lecturer), Research Associate, Cambridge, UK, Exploration in Fold & Thrust Belts A Personal Perspective

April 2012 Thursday, Apr. 19th Craig Knutson & Andy Bond, Pioneer Natural Resources Alaska Inc., Geology & Reservoirs of the Oooguruk Field

May 2012 Thursday, May 17th April Parsons, Statoil (Chukchi Sea topic)

If you would like to volunteer a talk or would like to suggest a speaker, please contact Dick Garrard at 644-4429.

Volume 42 Number 6 February 2012 Page 10

Meeting Information

The American Geological Institute provides a comprehensive list of national and international geoscience meetings at: http://calendar.agiweb.org

LLooccaall MMeeeettiinnggss::

American Water Resources Association Alaska Section http://www.awra.org/state/alaska/index.html

Alaska Geological Society http://www.alaskageology.org

Lunch meetings are held monthly September through May in Anchorage. For more information, contact Jim Clough, 451-5030.

Alaska Miners Association http://www.alaskaminers.org/

The Anchorage branch of the AMA holds weekly meetings at 7 AM every Friday at the Denny s on Northern Lights and Denali. They hold regular luncheon meetings in association with SME. For more information, contact the AMA office at 563-9229.

American Institute of Professional Geologists http://www.aipg.org

AIPG holds regular quarterly evening Section meetings in Anchorage and Fairbanks. For more information contact Mark Lockwood, President, at Shannon & Wilson, Inc., in Fairbanks, 907-458-3142.

Chugach Gem & Mineral Society http://www.chugachgms.org

CG&MS holds all meetings at the First United Methodist Church on 9th Avenue. Contact their hotline at 566-3403 for information on regular monthly business meetings, monthly potlucks, and guidebook sales, including the new Alaska Rockhound Guidebook.

Geophysical Society of Alaska http://gsa.seg.org/

Luncheon meetings are held monthly September through May at the ConocoPhillips Tower. For more information, contact Daniel Yancey, Daniel.yancey@bp.com

Society of Petroleum Engineers http://alaska.spe.org/

UAS Environmental Science Program http://www.uas.alaska.edu/envs

National Association of Geology Teachers (NAGT)

http://www.nagt

Enhanced Alaska Digital Well Log Data Since 1989

OCS, 95 out of 100 Alaska OCS wells. Mud logs for some. North Aleutian Basin wells, onshore and offshore. North Slope, 556 wildcats and key field wells. Kuparuk River Field, first 567 wells drilled (pre-1985). Southern Alaska, 1063 wells including all wildcats and many field wells. Directional surveys for most.

All digital log files

Are depth shifted to match resistivity curves.

Have core data rendered as a depth-shifted well log curve.

Have SP both in original form and as a straightened curve.

Have standardized mnemonics.

Have Volume of Shale curves, derived from gamma ray for North Slope, derived from SP for Cook Inlet.

Allow you to specify your own choice of mnemonics before delivery.

Are updated periodically with new wildcat wells.

Are delivered in LAS 2.0 format.

Contact Dan Shier:

303-278-1261 dan@rockypine.com

www.rockypine.com

Volume 42 Number 6 February 2012 Page 11

PRA 3601 C Street, Suite 822 Anchorage, AK 99503 (907) 272- 1232, (907) 272- 1344 (fax) info@petroak.com www.petroak.com

The Alaska Geological Society, Inc.

P.O. Box 101288

Anchorage AK 99510

On the web at: http://www.alaskageology.org

The Alaska Geological Society is an organization which seeks to promote interest in and understanding of Geology and the related Earth Sciences, and to provide a common organization for those individuals interested in geology and the related Earth Sciences.

This newsletter is the monthly (September-May) publication of the Alaska Geological Society, Inc. Number of newsletters/month: ~300

EDITOR Greg Wilson

Alaska Geological Society, Inc. P. O. Box 101288

Anchorage, AK 99510 e-mail: Gregory.c.wilson at conocophillips.com

(907) 263-4748 (office)

MEMBERSHIP INFORMATION AGS annual memberships expire November 1. The annual membership fee is $20/year. You may download a membership application from the

AGS website and return it at a luncheon meeting, or mail it to the address above.

Contact membership coordinator Greg Wilson with changes or updates (e-mail: gregory.c.wilson at conocophillips.com; phone: 907-263-4748)

All AGS publications are now available for on-line purchase on our website. Check to see the complete catalogue.

http://www.alaskageology.org/publications

ADVERTISING RATES Advertisements may be purchased at the following rates:

1/10 Page--$190/9mo, $75/1mo; size=1.8 x 3.5 inch 1/4 Page--$375/9mo, $95/1mo; size=4.5 x 3.5 or 2.2 x 7.5 inch 1/3 Page- $470/9mo, $105/1mo; size=7.0 x 3.5 or 3.0 x 7.5 inch 1/2 Page--$655/9mo, $125/1mo; size=9.0 x 3.5 or 4.5 x 7.5 inch

Full Page--$1000/9mo, $165/1mo; size=7.5 x 9.0 inch 1mo rate=(9mo rate/9)+$50 (rounded up).

Contact Tim Ryherd (907) 269-8771 for advertising information.

Membership Notes

Annual Dues for Membership in AGS are now $20.00

Membership renewal is Nov. 1st

Volume 42 Number 6 February 2012 Page 12

Note: e-mail addresses now contain at instead of @ Please change to @ when typing.

Phone e-mail Workplace President Ken Helmold 269-8673 Ken.helmold at alaska.gov DNR / DOG Past-President Tom Morahan 230-1672 Tmorahan at petroak.com PRA/ConocoPhillips President-Elect Steve Wright 263-7865 Sswr at chevron.com Chevron Vice-President Dick Garrard 644-4429 Rgarrard at talismanusa.com Talisman Treasurer Al Hunter 777-8324 whunter at hilcorp.com Hilcorp Secretary Chad Hults 786-7417 Chults at usgs.gov USGS Director 10-2012 Lee Ann Munk 786-6895 aflm at uaa.alaska.edu UAA Director 10-2012 Lisa Wright 263-4823 Lisa.H.Wright at conocophillips.com ConocoPhillips Director 10-2012 Kirk Sherwood 334-5337 Kirk.Sherwood at boem.gov BOEM Director 11-2013 Tom Homza 770-3701 Thomas.Homza at shell.com Shell Director 11-2013 Dave Schoderbek 265-6010 David.A.Schoderbek at ConocoPhillips.com ConocoPhillips Director 11-2013 Jim Brown Alaska Pacific University

AAPG Delegate Arlen Ehm 333-8880 Arlenehm at gci.net Geological Consultant AAPG Delegate & David Hite 258-9059 Hitelamb at alaska.net Geological Consultant Advertising Tim Ryherd 269-8771 Tim.ryherd at Alaska.gov DNR / DOG Com. Ed./Science Fair Jana DaSilva Lage 677-7883 Jldasilva5 at hotmail.com BOEM Field Trips Tom Plawman 227-2781 Tom.plawman at bp.com BP Bylaws Sue Karl 786-7428 Skarl at usgs.gov USGS Memberships Greg Wilson 263-4748 Gregory.c.wilson at conocophillips.com ConocoPhillips Alaska Newsletter Editor Greg Wilson 263-4748 Gregory.c.wilson at conocophillips.com ConocoPhillips Alaska Publications Peter Johnson 334-5329 Peter.Johnson at boem.gov BOEM Scholarship Sue Karl 786-7428 Skarl at usgs.gov USGS Website Jan Hazen Jan at homestead-graphics.com Consultant Fundraising Sunny Foster 269-8707 Sunny.Remmy at Alaska.gov DNR / DOG

Alaska Geological Society, Inc. P. O. Box 101288 Anchorage, AK 99510

2011 - 2012 Alaska Geological Society Board

Committees and Delegates

Redoubt Volcano 2009 Photo: G. Wilson