APPENDIXA:UPPERTRIASSICCHINLEFORMATIONCOMPOSITEMEASURED ... ·...
Transcript of APPENDIXA:UPPERTRIASSICCHINLEFORMATIONCOMPOSITEMEASURED ... ·...
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.
?