Folsom drought and episodic drying on the Southern High Plains from 10,900-10,200 14C yr B.P.

Research output: Contribution to journalArticle

82 Scopus citations

Abstract

The paleoenvironments of late Pleistocene and early Holocene time on the Southern High Plains have been studied for decades, but regionally extensive or long-term, easily recoverable proxy climate indicators are difficult to find. The stratigraphy of valley fill and upland eolian deposits and stable-carbon isotope data, in addition to geographically limited paleontological data, now provide clues to the environment during this time, which includes the earliest, or Paleoindian period (~11,200-8000 14C yr B.P.) of human occupation. During the Clovis occupation (~11,200-10,900 14C yr B.P.), valleys contained perennial streams. This was followed in Folsom time (10,900-10,200 14C yr B.P.) by an abrupt change to lakes and ponds (with water levels fluctuating between several meters depth and no surface water) and marshes and accumulation of sheet sands on uplands, starting the earliest phase of construction of the regional dune fields. These changing conditions indicate a shift from relatively wetter to relatively drier conditions with episodic drought. Stable-C isotopes further indicate that warming characterized the Clovis-Folsom transition. During the rest of the Paleoindian period the environment was relatively cool but fluctuated between wetter and drier conditions with an overall trend toward drying that resulted in further enlargement of the dune fields and culminated in the warm, dry Altithermal beginning ~8000 14C yr B.P. Clovis time probably was the wettest of any Paleoindian period in terms of runoff and spring discharge. The Folsom period was drier and was the earliest episode of regional wind erosion and eolian deposition and may have been the warmest of Paleoindian times. Evidence of a previously hypothesized 'Clovis drought' in this region is sparse.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalQuaternary Research
Volume53
Issue number1
DOIs
StatePublished - Jan 2000
Externally publishedYes

Keywords

  • Clovis
  • Drought
  • Folsom
  • Paleoindian
  • Southern High Plains

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Earth-Surface Processes
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Folsom drought and episodic drying on the Southern High Plains from 10,900-10,200 <sup>14</sup>C yr B.P.'. Together they form a unique fingerprint.

  • Cite this