Channel trenching and climatic change in the southern U.S. Great Plains

Research Article| April 01, 1990 Channel trenching and climatic change in the southern U.S. Great Plains Stephen A. Hall Stephen A. Hall 1Department of Geography, University of Texas, Austin, Texas 78712 Search for other works by this author on: GSW Google Scholar Author and Article Information Stephen A. Hall 1Department of Geography, University of Texas, Austin, Texas 78712 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (4): 342–345. https://doi.org/10.1130/0091-7613(1990)018<0342:CTACCI>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 Email Permissions Search Site Citation Stephen A. Hall; Channel trenching and climatic change in the southern U.S. Great Plains. Geology 1990;; 18 (4): 342–345. doi: https://doi.org/10.1130/0091-7613(1990)018<0342:CTACCI>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 Fifteen alluvial sequences in Texas and Oklahoma exhibit the same late Holocene record of channel trenching at 1 ka. The erosion was preceded by slow alluvial sedimentation in most stream valleys, resulting in the formation of a cumulic, organic-rich flood-plain soil previously named the Copan Soil. The soil formed during a period of regionally moister climate, as indicated by pollen spectra, molluscan faunas, vertebrate faunas, sedimentary structures, and high alluvial water tables. At 1 ka, the regional climate changed from moist to dry, coinciding with an episode of channel incision of valley floors throughout the southern Great Plains. Channel trenching occurred simultaneously in both small and large streams in drainage basins of the Arkansas, Red, Trinity, Brazos, and Colorado rivers; the sequences are the first documented example of widespread Holocene incision accompanied by firm evidence for a synchronous change in regional climate. 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.