Depositional facies of the Miocene-Pliocene Ogallala Formation, northwestern Texas and eastern New Mexico (1988)

Research Article| March 01, 1988 Depositional facies of the Miocene-Pliocene Ogallala Formation, northwestern Texas and eastern New Mexico Thomas C. Gustavson; Thomas C. Gustavson 1Bureau of Economic Geology, University of Texas, Austin, Texas 78713 Search for other works by this author on: GSW Google Scholar Dale A. Winkler Dale A. Winkler 2Shuler Museum of Paleontology, Southern Methodist University, Dallas, Texas 75275 Search for other works by this author on: GSW Google Scholar Author and Article Information Thomas C. Gustavson 1Bureau of Economic Geology, University of Texas, Austin, Texas 78713 Dale A. Winkler 2Shuler Museum of Paleontology, Southern Methodist University, Dallas, Texas 75275 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1988) 16 (3): 203–206. https://doi.org/10.1130/0091-7613(1988)016<0203:DFOTMP>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Thomas C. Gustavson, Dale A. Winkler; Depositional facies of the Miocene-Pliocene Ogallala Formation, northwestern Texas and eastern New Mexico. Geology 1988;; 16 (3): 203–206. doi: https://doi.org/10.1130/0091-7613(1988)016<0203:DFOTMP>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Deposition of the basal fluvial sediments of the Miocene-Pliocene Ogallala Formation in western Texas and eastern New Mexico was controlled by topography on the underlying erosional surface. Paleovalley-fill facies consist of gravelly and sandy braided-stream deposits interbedded with and overlain by eolian sediments deposited as sand sheets and loess. Uplands on the pre-Ogallala erosional surface are overlain primarily by similar eolian sediments. Calcic paleosols, consisting mostly of glaebules and rhizoconcretions of CaCO3, occur throughout the eolian facies. Massive to laminated and locally pisolitic, brecciated, and recemented pedogenic calcretes occur primarily near or at the top of the Ogallala Formation. Eolian facies preserve numerous superposed calcretes and calcic paleosols, reflecting slow episodic aggradation on a savanna or grassland under and to subhumid climatic conditions. The change from fluvial to mostly eolian sedimentation probably resulted from diversion of streams that deposited fluvial sediments of the Ogallala Formation to form the Pecos and Canadian rivers. Source areas for eolian sediments may initially have been floodplains of Ogallala braided streams and later the floodplains of the newly formed Pecos and Canadian rivers. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.