This outcrop is next to Split Mountain in Dinosaur National Monument, Utah, through which the Green River has erosionally carved a prominent canyon (off frame, to the left).
The reddish-colored rocks at left are hematite-rich, fine-grained siliciclastics of the Moenkopi Formation (Lower Triassic). At center & right is the Chinle Formation (Upper Triassic), a multicolored, nonmarine unit consisting of coarse-grained siliciclastics (fluvial channel facies) and fine-grained siliciclastics (floodplain facies). Quartz-permineralized fossil wood is famously common in the Chinle Formation (for example, Petrified Forest National Park in Arizona).
The brown rocks at center are sandstones and conglomerates at the base of the Chinle Formation. This unit is called the Shinarump Member or Shinarump Conglomerate. At Dinosaur National Monument, the unit is also known as the Gartra Member of the Chinle Formation.
Structurally, this is the southern flank of the Split Mountain Anticline, which strikes east-west and plunges westward. This is also the northern flank of the Jensen Syncline.
Stratigraphy: Shinarump Conglomerate (Shinarump Member), lower Chinle Formation, Upper Triassic
Locality: southern flanks of Split Mountain, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA (40° 26' 30.00" North latitude, 109° 14' 55.58" West longitude)
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See info. at:
en.wikipedia.org/wiki/Dinosaur_National_Monument
------------
Geologic map of Dinosaur National Monument:
pubs.usgs.gov/imap/1407/plate-1.pdf
Tags: Chinle Formation Triassic Dinosaur National Monument Utah Shinarump Conglomerate Member Moenkopi
This outcrop is next to Split Mountain in Dinosaur National Monument, Utah, through which the Green River has erosionally carved a prominent canyon (off frame, to the left).
The reddish-colored rocks at left are hematite-rich, fine-grained siliciclastics of the Moenkopi Formation (Lower Triassic). At center & right is the Chinle Formation (Upper Triassic), a multicolored, nonmarine unit consisting of coarse-grained siliciclastics (fluvial channel facies) and fine-grained siliciclastics (floodplain facies). Quartz-permineralized fossil wood is famously common in the Chinle Formation (for example, Petrified Forest National Park in Arizona).
The brown rocks at center are sandstones and conglomerates at the base of the Chinle Formation. This unit is called the Shinarump Member or Shinarump Conglomerate. At Dinosaur National Monument, the unit is also known as the Gartra Member of the Chinle Formation.
Structurally, this is the southern flank of the Split Mountain Anticline, which strikes east-west and plunges westward. This is also the northern flank of the Jensen Syncline.
Stratigraphy: Shinarump Conglomerate (Shinarump Member), lower Chinle Formation, Upper Triassic
Locality: southern flanks of Split Mountain, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA (40° 26' 30.00" North latitude, 109° 14' 55.58" West longitude)
------------
See info. at:
en.wikipedia.org/wiki/Dinosaur_National_Monument
------------
Geologic map of Dinosaur National Monument:
pubs.usgs.gov/imap/1407/plate-1.pdf
Tags: Chinle Formation Triassic Dinosaur National Monument Utah Shinarump Conglomerate Member
This outcrop is next to Split Mountain in Dinosaur National Monument, Utah, through which the Green River has erosionally carved a prominent canyon (off frame, to the left).
This is the Chinle Formation (Upper Triassic), a multicolored, nonmarine unit consisting of coarse-grained siliciclastics (fluvial channel facies) and fine-grained siliciclastics (floodplain facies). Quartz-permineralized fossil wood is famously common in the Chinle Formation (for example, Petrified Forest National Park in Arizona).
The brown rocks at center & left are sandstones and conglomerates at the base of the Chinle Formation. This unit is called the Shinarump Member or Shinarump Conglomerate. At Dinosaur National Monument, the unit is also known as the Gartra Member of the Chinle Formation.
Structurally, this is the southern flank of the Split Mountain Anticline, which strikes east-west and plunges westward. This is also the northern flank of the Jensen Syncline.
Stratigraphy: Shinarump Conglomerate (Shinarump Member), lower Chinle Formation, Upper Triassic
Locality: southern flanks of Split Mountain, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA (40° 26' 30.00" North latitude, 109° 14' 55.58" West longitude)
------------
See info. at:
en.wikipedia.org/wiki/Dinosaur_National_Monument
------------
Geologic map of Dinosaur National Monument:
pubs.usgs.gov/imap/1407/plate-1.pdf
Tags: Chinle Formation Triassic Dinosaur National Monument Utah Shinarump Conglomerate Member Gartra
This outcrop is near Split Mountain in Dinosaur National Monument, Utah, through which the Green River has erosionally carved a prominent canyon. Split Mountain is the light grayish-brown prominence in the background.
The yellowish-brown rocks in the foreground are the Shinarump Member of the basal Chinle Formation (Upper Triassic). The Chinle is a multicolored, nonmarine unit consisting of coarse-grained siliciclastics (fluvial channel facies) and fine-grained siliciclastics (floodplain facies). Quartz-permineralized fossil wood is famously common in the Chinle Formation (for example, Petrified Forest National Park in Arizona).
The Shinarump Member (also known as the Shinarump Conglomerate) here consists of sandstones and conglomerates. At Dinosaur National Monument, the unit is also known as the Gartra Member of the Chinle Formation.
Structurally, this is the southern flank of the Split Mountain Anticline, which strikes east-west and plunges westward. This is also the northern flank of the Jensen Syncline.
Stratigraphy: Shinarump Conglomerate (Shinarump Member), lower Chinle Formation, Upper Triassic
Locality: roadside outcrop southwest of Split Mountain, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA (40° 26' 32.18" North latitude, 109° 15' 28.72" West longitude)
------------
See info. at:
en.wikipedia.org/wiki/Dinosaur_National_Monument
------------
Geologic map of Dinosaur National Monument:
pubs.usgs.gov/imap/1407/plate-1.pdf
Tags: Chinle Formation Triassic Dinosaur National Monument Utah Shinarump Conglomerate Member Gartra
This outcrop is near Split Mountain in Dinosaur National Monument, Utah, through which the Green River has erosionally carved a prominent canyon.
The rocks here are part of the Shinarump Member of the basal Chinle Formation (Upper Triassic). The Chinle is a multicolored, nonmarine unit consisting of coarse-grained siliciclastics (fluvial channel facies) and fine-grained siliciclastics (floodplain facies). Quartz-permineralized fossil wood is famously common in the Chinle Formation (for example, Petrified Forest National Park in Arizona).
The Shinarump Member (also known as the Shinarump Conglomerate) at this site consists of sandstones and conglomerates. At Dinosaur National Monument, the unit is also known as the Gartra Member of the Chinle Formation.
Structurally, this is the southern flank of the Split Mountain Anticline, which strikes east-west and plunges westward. This is also the northern flank of the Jensen Syncline.
Stratigraphy: Shinarump Conglomerate (Shinarump Member), lower Chinle Formation, Upper Triassic
Locality: roadside outcrop southwest of Split Mountain, Dinosaur National Monument, northern Uintah County, northeastern Utah, USA (40° 26' 32.18" North latitude, 109° 15' 28.72" West longitude)
------------
See info. at:
en.wikipedia.org/wiki/Dinosaur_National_Monument
------------
Geologic map of Dinosaur National Monument:
pubs.usgs.gov/imap/1407/plate-1.pdf
Tags: Chinle Formation Triassic Dinosaur National Monument Utah Shinarump Conglomerate Member Gartra