APPENDIX A: UPPER TRIASSIC CHINLE FORMATION COMPOSITE MEASUREDSECTION, PETRIFIED FOREST NATIONAL PARK, SEPTEMBER 2013

Planar-tabular cross bedding

Inclined-horizontal bedding

Trough cross bedding

Scour-and-fill

Current ripple

Pedogenic carbonate channel lag

Root trace

Burrow

Intraclast

Carbonaceous fragment

Terrestrial vertebrate bone

Pedogenic carbonate nodule

Fossilized tree stump

Millimeter to centimeter lamina

UTh

Fossilized log

Thalassinoides burrow

UPl

Planolites burrow

USk

Skolithos burrow

Crystalline gypsum masses

Siliciclastic granules

Sandy/silty peloid packstone(limestone)

Bedded gypsum

Ostracode

Unionid bivalve

Intraclast

Paleosol

Interval of lowaccommodation

4 Sequence (numbered 1-5)

Flaser, wavy or lenticular bedding

Sigmoidal crossbed

SS24

MR44MR45

MR43

MR46MR47

MR48

MR49

SS30

Cl St Vf F M C Vc Gvl

conglom. fractiontexture

sandtone fractiontexture

sample location

paleosol # (1)Indicates zircon date from *Ramezani et al., (2011).(2)Indicates new zircon date presented in this study.*Ramezani, J., Hoke, G.D., Fastovsky, D.E.,Bowring, S.A., Therrien, F., Dworkin, S.I., Atchley,S.C., and Nordt, L.C., 2011, High-precision U-Pbzircon geochronoloy of the Late Triassic ChinleFormation, Petrified Forest National Park (Arizona,USA): Temporal constraints on the early evolutionof dinosaurs: Geological Society of AmericaBulletin, v. 123, p. 2142-2159.

(3)Cooley, M.E., 1958, The Mesa RedondoMember of the Chinle Formation, Apache andNavajo Counties, Arizona: Plateau, v. 31, p. 7-15.

Lithostratigraphic nomenclature follows Martz andParker (2010).

LEGEND

N35o09.4730"W109o48.3421"

Latitude-longitude coordinates(Godetic datum = WGS84)

90

0

180

270

N=10

Paleocurrent rose diagram

CH75

CH76.1,76.2

UPL

UPl

CH76.5

CH77

UPl, Th, SkMudstone to peloid packstone with admixed siliciclasticsilt and very fine sand.

UTh?Burrows (?) look similar to Thalassinoides forms in themarine realm

SS36

SS37

SS38

Pronounced lateral accretion within channel scour.

Mudstone to peloid packstone with admixed siliciclasticsiltstone and very fine sandstone

Poorly-sorted hematitic, clay-rich matrix.

Lateral accretion within channel scour.

(1)<207.8 Ma

97

98

99

101

100

102

103

340

350

360

370

FEET

MET

ERS

1150

1200

380

OW

LR

OC

KM

EMB

ER

CH

IND

EM

ESA

UPP

ERC

OM

POSI

TESE

QU

ENC

E

PALE

OSO

LN

UM

BER

S

FAC

s

GEO

GR

APH

ICLO

CAT

ION

LITH

OST

RAT

IGR

APH

Y

CO

MPO

SITE

SEQ

UEN

CES

Cl St Vf F M C Vc GvlLOW

ACC

OM

MO

DAT

ION

INTE

RVA

L

Grain Size

1250

CH69

CH68.25,68.5,

Pronounced channel scour and lateral accretion fill.

CH71.5

CH71

CH72

CH74

CH75

SS35

CH70A

CH70B

SS34

N35o09.4730"W109o48.3421"

N35o09.2841"W109o48.5192"

N35o09.3239"W109o48.5273"

OW

LR

OC

KM

EMB

ER

CH

IND

EM

ESA

88

89

90

91

92

93

94

95

96

97

290

300

310

320

330

340

350

950

1000

1050

1100

1150

UPP

ERC

OM

POSI

TESE

QU

ENC

E

?

90

0

180

270

N=12

L40

L41

L42

Micaceous white sandstone.

SS22

CaCO3 nodule channel lag?Decapitated Bk?

Late

ralA

ccre

tion

Late

ralA

ccre

tion

CH69

CH68.25,68.5,68.75

N35o03.0325"W109o48.7243"

SS35

CH70A

CH70B

Log orientation data from Ash (1992)

Black Forest Bed

SS23

(1)209.926 Ma

GS1

GS2GS3GS4

Conglom. clasts up to 1cm diameter.Matrix-supported gravel. Very-poorlysorted.GS5

Lateral accretion/inclinedheterolithic strata. Appears tobe final channel fill successionof top Citadel sandstone.

C39

N35o03.8689"W109o51.6770"

N35o03.5920"W109o48.9770"

Lithodendron WashBed

SS21

90

0

180

270

N=17

N35o03.2345"W109o49.1478"

Painted DesertSandstone #4

PETR

IFIE

DFO

RES

TM

EMB

ER

LAC

EYPO

INT

85

86

87

88

89

90

230

240

250

260

270

280

290

79

80

8182

83

84

THE

GIV

ING

SITE

750

800

850

900

950

UPP

ERC

OM

POSI

TESE

QU

ENC

E

10 8 6 4 2 0 2 4 6 8 10

NORTHBases North

(n=20)Bases South

(n=90)

Paleocurrent direction derivedfrom trough and inclined planar-horizonal crossbedding.

Paleocurrent direction derivedfrom trough, planar-tabular andinclined planar-horizonalcrossbedding.

90

180

270

N=12

SS33

N34o51.9782"W109o49.6413"

C32

C33

Rhizoliths.

Rhizoliths.

C33.5C34

C35

C36

SS17a,bConglom. clasts up to 3cm diameter.

from The Citadel

G

C37

C38

C39

Rhizoliths.

SS19

S. Dworkin sampledreworked carbonate nodules

N35o02.778"W109o50.775"

Suspension-load channelscour-and-fill lateral accretioncomplex

N35o03.8689"W109o51.6770"

N35o03.7218"W109o51.6796"

N35o03.8456"W109o51.8645"

N35o03.5920"W109o48.9770"

90

0

180

270

N=17

ML65

ML66

ML67ML68

Flattops Sandstone #2

Lithodendron WashBed

SS21

SS18

THE

CIT

ADEL

180

190

200

210

220

230

65

66

67

68

69

70

71

7273

74

75

76

77

78

79

THE

GIV

ING

SITE

600

650

700

750

PETR

IFIE

DFO

RES

TM

EMB

ER

UPP

ERC

OM

POSI

TESE

QU

ENC

EU

PPER

CO

MPO

SITE

SEQ

UEN

CE

Paleocurrent direction derivedfrom trough, planar-tabular andinclined planar-horizonalcrossbedding.

Paleocurrent direction derivedfrom trough and planar-tabularcross bedding, and current rip-ples.

90

0

180

270

N=11

90

0

180

270

N=8

Conglom. clasts up to 7cm diameteras lag along scour/reactivationsurfaces

large-scalebedforms

N34o52.0508"W109o49.4358"

ML52

ML53

xxxxx

ML54

ML55

N34o56.4065"W109o45.7463"

“persistent red silcrete”

Conglom. clasts up to 6cm diameteras lag along scour/reactivationsurfaces. Downstream accretion.

ML56ML57

ML58

ML59

Abundant coalescedCaCO3 nodules.

Groundwater?Erosion to Bkhorizon?

N34o52.1148"W109o49.5598"

N34o52.1148"W109o49.5598"

ML60ML60.5

ML61

Mud

-san

dfra

mew

ork

mix

ture

Alternating mud and grain-supportedbedsets...Laterally-accreting bar formsthat change facies laterally into overbankmud. Mud-rich conglomerates may bereworked debris flow deposits.

Pebbles.

SS32A

SS32

SS15

90

0

180

270

N=10

ML62ML63

ML64

ML65

ML66

ML67ML68

Jasper Forest Bed

Long Logs Sandstone

Flattops Sandstone #1

xxxxxxxxxxx Orange “silcrete” observed atN34o55.5031, W109o45.6708

SS31

(1)213.124 Maestimated stratigraphicposition

Adamanian-Revueltianfaunal turnover

(1)218.017 Maestimated stratigraphic position

SON

SELA

MEM

BER

MO

UN

TAIN

LIO

NM

ESA

120

130

140

150

160

170

180

48

49

50

51

52

53

54

55

56

57

58

5960

61

62

63

64

65

66

67

68

400

450

500

550

600

UPP

ERC

OM

POSI

TESE

QU

ENC

EPaleocurrent direction derivedfrom trough and inclined planar-horizontal cross bedding.

Paleocurrent direction derivedfrom trough cross bedding.

Paleocurrent direction derivedfrom trough cross bedding andfossil log orientations.

90

180

270

N=8

90

0

180

270

N=11

90

0

180

270

N=10

GT15

GT16

GT17GT17.25GT17.5

Bill

Park

erre

ports

fres

hw

ater

shar

ks,

amph

ibia

nsan

dre

ptile

sw

ithin

this

inte

rval

.

complete phytosaurskeleton at this position

tree stump with metalNPS marker PEFO 2001C-2

GT18

GT19

GT20

SS7

SS5

GT21GT22

Conglom. clasts range from 1-3 cmin diameter.

SS6

N34o56.5994"W109o46.0806"

N34o56.5479"W109o46.0078"

N34o56.4426"W109o46.1524"

N34o56.5994"W109o46.0806"

N34o56.5479"W109o46.0078"

Granule-size

N34o56.4148"W109o45.8335"

BM23

Large-scale dune forms

BM24BM25

SS8

SS9

SS10

BM26

SS11

BM27,27.5

SS12

BM28

SS13

BM29BM29.5

BM30

Conglom. clasts up to 5cm diameteras lag along scour/reactivationsurfaces. Downstream accretion.

SS14

Lateral-accretionreactivation surfaces

Conglom. clasts up to 7cm diameteras lag along scour/reactivationsurfaces

large-scalebedforms

W109o49.4358"

N34o56.4065"W109o45.7463"

SS15

N34o56.4539"W109o45.8644"

Green “lacustrine”mudrock

Jasper Forest Bed

xxxxxxxxxxx Orange “silcrete” observed atN34o55.5031, W109o45.6708

(1)ca 223.036 Maestimatedstratigraphic

(1)ca 219.317 Ma estimatedstratigraphic location

?

(1)218.017 Maestimated stratigraphic position

THE

TEPE

ESB

LUE

MES

A

70

80

90

100

110

120

27

28

2930

31

32

33

34

35

36

37

38

3940

41

42

43

44

45

46

47

48

49

250

300

350

400

(2)ca 220.123 Ma

SON

SELA

MEM

BER

LOW

ERC

OM

POSI

TESE

QU

ENC

E

Camp Butte Bed

Paleocurrent direction derivedfrom trough cross bedding andfossil log orientations.

Paleocurrent direction derivedfrom trough and planar-tabularcross bedding.

Paleocurrent direction derivedfrom trough cross bedding.

unnamed sandstone

MR47

MR48

MR49

sand

ston

em

atrix

text

ure

grav

elte

xtur

e

90

0

180

270

N=16

MR49.5

MR50

T1T2T3

SS29

SS28

SS30

T4

T4.5

SS0 SS0 collected at base of “Tepees” section

T6

T5

T7

SS1a

SS1

Interfluve truncation surface equivalentto “white” conspicuous channel-fillingsandstone (SS3)

T8

?

?

c

T9T10

T11

mechanically-laminatedunidentifiablebedform SS2

SS4

GT12GT13GT14

GT15

GT16

GT17GT17.25GT17.5

Bill

Park

erre

ports

fres

hw

ater

shar

ks,

amph

ibia

nsan

dre

ptile

sw

ithin

this

inte

rval

.

complete phytosaurskeleton at this position

tree stump with metalNPS marker PEFO 2001C-2

GT18SS7

SS5

Average gravel size ~ 3cm; cobblesas large as 15-20cm and as small as

N34o39.9279"W109o41.0975"

N34o56.4787"W109o46.2156"

N34o56.5994"W109o46.0806"

N34o56.4426"W109o46.1524"

N34o56.5994"W109o46.0806"

90

0

180

270

N=19

90

0

180

270

N=7

(3)MedialConglomerate

Green “lacustrine”mudrock

Newspaper Rock Bed

Mottled StrataMR51

Granule size clasts

Granule size clasts

(1)ca 225.185 Ma

(1)ca 223.036 Maestimatedstratigraphicposition

xxxxxxxxxxx

MES

AR

EDO

ND

OM

EMB

ERB

LUE

MES

AM

EMB

ER

HU

NT

VALL

EYTH

EH

AYST

ACK

STH

ETE

PEES

10

20

30

40

50

60

70

45

6

7

8

9

10

11

121314

15

16

17

18

19

202122

23

242526

27

28

2930

31

32

100

50

150

200

LOW

ERC

OM

POSI

TESE

QU

ENC

E

(2)ca 220.123 Ma

Paleocurrent direction derivedfrom current ripples.

Paleocurrent direction derivedfrom trough cross bedding andplan-view channel axisorientations.

Paleocurrent direction derivedfrom trough and inclined planar-horizontal cross bedding.

MR44MR45

MR46MR47

MR48

MR49

sand

ston

em

atrix

text

ure

grav

elte

xtur

e

SS24MR43

MR43-49 measured fromthis location

SS30

SS27

N34o39.7489"W109o40.6146"

N34o39.9279"W109o41.0975"

Average gravel size ~ 3cm; cobblesas large as 15-20cm and as small as0.5cm

90

0

180

270

N=19

Cl St Vf F M C Vc Gvl

(3)MedialConglomerate

(2)ca 227.685 Ma

MES

AR

EDO

ND

OM

EMB

ER

HU

NT

VALL

EY

0 0

10

0

1

2345

6

750

Paleocurrent direction derivedfrom trough and inclined planar-horizontal cross bedding.

?