Segmentation of alluvial fans in Death Valley, California: new insights from surface exposure dating and laboratory modelling

R. Leb. Hooke, Ronald Dorn

Research output: Chapter in Book/Report/Conference proceedingChapter

65 Scopus citations

Abstract

Laboratory experiments, recent palaeoenvironmental analyses of rock varnish, and surface exposure dating of geomorphic units have led to new insights into the process of entrenchment and segmentation of alluvial fans, and into the history of Quaternary sedimentation in Death Valley. Entrenchment begins at the fanhead. As the trench deepens, its down-slope end migrates down-fan, taking several tens of thousands of years to reach lower parts of the fan. Sedimentation on the salt pan in southern Death Valley is not, at present, in equilibrium with that on the fans. Rather, it seems to be adjusting to an increase in the amount of fine material reaching the playa, due in part to breaching of the outlet of Lake Tecopa somewhat after 600 ka BP, and in part to subsidence of different parts of the valley at different rates. -from Authors

Original languageEnglish (US)
Title of host publicationEarth Surface Processes & Landforms
Pages557-574
Number of pages18
Volume17
Edition6
StatePublished - 1992

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

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    Leb. Hooke, R., & Dorn, R. (1992). Segmentation of alluvial fans in Death Valley, California: new insights from surface exposure dating and laboratory modelling. In Earth Surface Processes & Landforms (6 ed., Vol. 17, pp. 557-574)