Biostratigraphy and evolution of the Momipites‐Caryapollenites lineage in the early tertiary in the Wind River Basin, Wyoming

Nichols, Douglas J.; Ott, Henry L.

doi:10.1080/01916122.1978.9989167

Cited by 139 publications

(105 citation statements)

References 9 publications

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“…The exact stratigraphic relationship of the Platycarya FAD (first appearance datum) to the Clarkforkian/Wasatchian boundary is not known, but the events are approximately coeval. Platycarya pollen is absent from definite Paleocene beds (Nichols and Ott, 1978), but present stratigraphically below early Wasatchian mammalian fossils (Wing et al, 1991).…”

Section: Floral Listsmentioning

confidence: 96%

Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin

Wing

Alroy

Hickey

1995

Palaeogeography, Palaeoclimatology, Palaeoecology

141

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Section: Floral Listsmentioning

confidence: 96%

Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin

Wing

Alroy

Hickey

1995

Palaeogeography, Palaeoclimatology, Palaeoecology

141

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“…The oldest arkosic conglomerate in this part of the basin is at the base of the Lost Cabin Member of the overlying Eocene Wind River Formation. The presence of extensive lacustrine sediments, which first appeared in the Wind River Basin in late Paleocene time (Nichols and Ott, 1978;Phillips, 1983) (Hail, 1965;Wellborn, 1977;Madden, 1979; S.B. Roberts, U.S. Geological Survey, oral commun., 1990).…”

Section: Wind River Basinmentioning

confidence: 99%

Application of structural geology to mineral and energy resources of the Central and Western United States

Thorman¹

1992

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“…In much of the rest of the basin, the units are characterized by numerous dark carbonaceous shale beds and thin coal seams, indicating deposition in ephemeral lakes and peat swamps or mires in interfluve areas. In the type area of the Lance Formation, located in the southeastern part of the Powder River Basin, ceratopsian dinosaur Nichols and Ott (1978) and Nichols and others (1982).…”

Section: Regional Stratigraphymentioning

confidence: 98%

Sedimentology and depositional history of the lower Paleocene Tullock Member of the Fort Union Formation, Powder River basin, Wyoming and Montana

Brown¹

1993

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The Powder River Basin occupies a 22,000-mi 2 (35,000-km 2 ) area of northeastern Wyoming and southeastern Montana. Rocks of the Tullock Member (lower Paleocene) of the Fort Union Formation represent alluvial sedimentation in a Laramide intracratonic basin. The Cretaceous-Tertiary time line at or near the base of the Tullock provides temporal control for the timing and distribution of these basin infilling events. Tullock sediments have a maximum thickness of about 113 m (371 ft) in the north and 439 m (1,440 ft) in the south. The infilling Tullock clastic sediments merged eastward with distant delta-plain systems containing aggrading distributary channels that flowed into the Cannonball epicontinental sea.The Tullock Member was deposited in a continental fluvial environment. Channel deposits (comprising about onethird of the sequence) contain mainly trough and tabular planar crossbedded and climbing-ripple laminated sandstone; reactivation surfaces, liquefaction fronts, and structures resulting from soft-sediment deformation are also common, suggesting episodic rapid deposition, saturation of sediments, and a high watertable. Fine-grained overbank deposits (making up about two-thirds of the sequence) show color mottling, contain plant, wood, and coal fragments, have obscure bedding or no apparent internal structure, and contain thin coal beds.Tullock sandstone geometry and sedimentary structures suggest bankfull depths equal to paleochannel thickness, low fluvial gradient, low sinuosity, highly stable vegetated banks, and lenticular channel form. Channel systems carried predominantly suspended loads on mature low-gradient flood plains. Mud-dominated sediment moved through Tullock fluvial channels principally by downstream aggradation by bar construction, and build-up of the floodplain over low levees by overbank flooding, depositing mainly suspended material.Sedimentary structures and geometry of Tullock sediments suggest deposition in anastomosed river systems.

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Biostratigraphy and evolution of the Momipites‐Caryapollenites lineage in the early tertiary in the Wind River Basin, Wyoming

Cited by 139 publications

References 9 publications

Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin

Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin

Application of structural geology to mineral and energy resources of the Central and Western United States

Sedimentology and depositional history of the lower Paleocene Tullock Member of the Fort Union Formation, Powder River basin, Wyoming and Montana

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