866 D. Submarine Geology and Geophysics OLR (1984)31 (12)

A program was conducted in the Santa Barbara Channel (offshore California) to ascertain a marine gradiometer's ability 'to produce diurnal-free total magnetic intensity data.' For this location, 'ship- minus-shore and integrated total intensities pro- duced maps with standard residual misties of 0.55 and 0.62 gammas, respectively.' The marine mag- netic gradiometer's operational simplicity and effi- cacy in eliminating diurnal activity support its routine use although 'moderately more sophisticated data analysis procedures' are required. ARCO Oil and Gas Co., P.O. Box 2819, Dallas, Tex. 75221, USA. (ihz)

84:6063 Ganeev, A.A., N.R. Mashianov, G.B. Sveshnikov

and S.E. Sholupov, 1984. On the possibility of active tectonic structure mapping using mercury haloes over sea surfaces. Dokl. Akad. Nauk SSSR, 275(5):1162-1163. (In Russian.)

84:6064 Karcz, Iaakov, Zygmunt Perelman and Richard

Panski, 1984. Assessment of the possible use of a Tellurometer MA 100 in the study of horizontal crustal movements along the Jordan-Dead Sea Rift. Israel J. Earth-Sci., 33(i/2):63-71.

The calibration and reproducibility of measurements made with a Tellurometer MA 100 (Set. Nr. 508) electro-optical distance measuring instrument are discussed based on data collected from 1976-1983. The authors conclude that the instrument is suitable for measuring plate motions larger than 0.3 mm/yr, in particular along the Jordan-Dead Sea Rift, if a measurement program can be sustained for at least 20-30 years. Geol. Survey of Israel, 30 Malchei Israel St., Jerusalem 95 501 Israel. (amt)

84:6065 Turcotte, D.L. and P.M. Kenyon, 1984. Synthetic

passive margin stratigraphy. Am. Ass. Petrol. Geol. Bull., 68(6):768-775.

Synthetic stratigraphic cross sections are derived mathematically for a variety of simple conditions. Model variables include variations in sea level and rates of tectonic subsidence, sedimentation, and erosion. Derived stratigraphic relationships include unconformities, correlative conformities and dis- conformities, coastal onlap, coastal toplap, erosional truncation, pinch-out, and sigrnoidal progradational clinoforms. An important conclusion is that the rate of erosion is a dominant variable in determining the type of stratigraphic section observed. The proposed approach may provide the basis for either a forward or inverse modelling of seismic stratigraphic sec-

tions. Dept. of Geol. Sci., Cornell Univ., Ithaca, NY 14853, USA.

84:6066 Wellstood, Frederick, C. Heiden and John Clarke,

1984. Integrated dc SQUID (superconducting quantum interference device) magnetometer with a high slew rate. Rev. scient. Instrums, 55(6):952- 957. Dept. of Phys., Univ. of Calif., Berkeley, Calif. 94720, USA.

84:6067 Wilson, G.C., A.E. Litherland and J.C. Rucklidge,

1984. Dating of sediments using accelerator mass spectrometry. Chem. Geol., 44(1/3):1-17.

Assessed are the current status and future prospects for dating recent sediments by direct counting of radionuclides (cosmogenic, natural terrestrial, and artificial) using accelerator-based mass spectrome- ters. Relevant isotopes and equipment are discussed, with particular reference to the 3-MV electrostatic accelerator system of the University of Toronto. Inherent difficulties of the new method are outlined; possible applications are identified. The ability to obtain radiocarbon dates from very small samples (e.g., ~<100 /zg C) illustrates the promise of the method. ISOTRACE Lab., Univ. of Toronto, To- ronto, Ont. M5S 1A7, Canada.

D40. Area studies, surveys, bathymetry

84:6068 Aljinovi~, Bruno, Ivan Blaskovi~, Dragutin Cvija-

novi6, Eduard Prelogovi~, Dragutin Skoko and Nusret Brdarevi6, 1984. Correlation of geophys- ical, geological and seismological data in the coastal part of Yugoslavia. Boll. Oceanol. teor. appl., II(2):77-90. Geofizika, Zagreb, Yugoslavia.

84:6069 Feng, Yun, Yongqi Zhu and Chengkai Zeng, 1983.

Compilation and design of the topographic maps of the Talwan Strait. Taiwan Strait, 2(2):56-65. (In Chinese, English abstract.)

The list includes a comprehensive tabulation of existing maps and written data on the Taiwan Strait with notations on water depths, topographic char- acteristics, and cartographic techniques. Second Inst. of Oceanogr., Natl. Bureau of Oceanography, Peo- ple's Republic of China. (hbf)

84:6070 Hill, P.R., 1984. Sedimentary facies of the Nova

Scotian upper and middle continental slope,