Late Quaternary environmental change in the Bonneville basin, western USA

D. B. Madsen, D. Rhode, D. K. Grayson, J. M. Broughton, S. D. Livingston, J. Hunt, J. Quade, D. N. Schmitt, M. W. Shaver

Research output: Contribution to journalArticle

79 Scopus citations

Abstract

Excavation and analyses of small animal remains from stratified raptor deposits spanning the last 11.5 ka, together with collection and analysis of over 60 dated fossil woodrat midden samples spanning the last 50 ka, provide a detailed record of changing climate in the eastern Great Basin during the late Pleistocene and Holocene. Sagebrush steppe dominated the northern Bonneville basin during the Full Glacial, suggesting that conditions were cold and relatively dry, in contrast to the southern basin, which was also cold but moister. Limber pine woodlands dominated ∼13-11.5 ka, indicating increased dryness and summer temperatures ∼6-7°C cooler than present. This drying trend accelerated after ∼11.5 ka causing Lake Bonneville to drop rapidly, eliminating 11 species of fish from the lake. From ∼11.5-8.2 ka xerophytic sagebrush and shadscale scrub replaced more mesophilic shrubs in a step-wise fashion. A variety of small mammals and plants indicate the early Holocene was ∼3°C cooler and moister than at present, not warmer as suggested by a number of climatic models. The diversity of plants and animals changed dramatically after 8.2 ka as many species disappeared from the record. Some of the upland species returned after ∼4 ka and Great Salt Lake became fresh enough at ∼3.4 and ∼1.2 ka to support populations of Utah chub.

Original languageEnglish (US)
Pages (from-to)243-271
Number of pages29
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume167
Issue number3-4
DOIs
StatePublished - Mar 15 2001

Keywords

  • Faunal change
  • Great Basin
  • Lake Bonneville fish
  • Paleoclimates
  • Quaternary
  • Vegetation change

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Palaeontology

Fingerprint Dive into the research topics of 'Late Quaternary environmental change in the Bonneville basin, western USA'. Together they form a unique fingerprint.

  • Cite this

    Madsen, D. B., Rhode, D., Grayson, D. K., Broughton, J. M., Livingston, S. D., Hunt, J., Quade, J., Schmitt, D. N., & Shaver, M. W. (2001). Late Quaternary environmental change in the Bonneville basin, western USA. Palaeogeography, Palaeoclimatology, Palaeoecology, 167(3-4), 243-271. https://doi.org/10.1016/S0031-0182(00)00240-6