Climate and landscape reconstruction of the Arroyo Chijuillita Member of the Nacimiento Formation, San Juan Basin, New Mexico : providing environmental context to early Paleocene mammal evolution.

Davis, Adam James, 1989-

Climate and landscape reconstruction of the Arroyo Chijuillita Member of the Nacimiento Formation, San Juan Basin, New Mexico : providing environmental context to early Paleocene mammal evolution.

dc.contributor.advisor	Atchley, Stacy C.
dc.creator	Davis, Adam James, 1989-
dc.creator.orcid	0000-0001-9174-9217
dc.date.accessioned	2019-07-29T14:40:19Z
dc.date.available	2019-07-29T14:40:19Z
dc.date.created	2019-05
dc.date.issued	2019-04-18
dc.date.submitted	May 2019
dc.date.updated	2019-07-29T14:40:19Z
dc.description.abstract	Sedimentologic, stratigraphic, and paleopedologic attributes of an outcrop of the lower Paleocene Arroyo Chijuillita Member (Nacimiento Formation) in the Bisti/De-Na-Zin Wilderness Area (San Juan Basin, New Mexico) are studied to provide paleoenvironmental context for the Puercan North American Land Mammal Ages (NALMA). The outcrop intersects the middle and late Puercan (Pu2-Pu3) age and is ideal to assess potential causes of this turnover. Fluvial channel and laterally continuous sandstones and associated fine-grained floodplain deposits, including paleosols documenting variability in drainage and maturity, comprise the outcrop. Paleoclimatic reconstructions from paleosols indicate no change in climate, and evidence of regional tectonics effecting deposition is not observed. Spatial and temporal variability in paleopedologic and sedimentologic characteristics are interpreted to be the result of autocyclic channel avulsion/migration. These observations suggest that mammalian turnover (Pu2-Pu3) is likely the result of rapid evolution following the K-Pg boundary and/or competition from migration of mammalian species into the basin.
dc.format.mimetype	application/pdf
dc.identifier.uri	https://hdl.handle.net/2104/10694
dc.language.iso	en
dc.rights.accessrights	Worldwide access
dc.subject	Nacimiento. Arroyo Chijuillita. Paleosols. Sedimentology. Stratigraphy. Climate reconstruction.
dc.title	Climate and landscape reconstruction of the Arroyo Chijuillita Member of the Nacimiento Formation, San Juan Basin, New Mexico : providing environmental context to early Paleocene mammal evolution.
dc.type	Thesis
dc.type.material	text
thesis.degree.department	Baylor University. Dept. of Geosciences.
thesis.degree.grantor	Baylor University
thesis.degree.level	Masters
thesis.degree.name	M.S.