Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska

Paul D. Zander, Darrell S Kaufman, Stephen C. Kuehn, Kristi L. Wallace, Scott R Anderson

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Marked changes in sediment types deposited in Cabin Lake, near Cordova, Alaska, represent environmental shifts during the early and late Holocene, including fluctuations in the terminal position of Sheridan Glacier. Cabin Lake is situated to receive meltwater during periods when the outwash plain of the advancing Sheridan Glacier had aggraded. A brief early Holocene advance from 11.2 to 11.0 cal ka is represented by glacial rock flour near the base of the sediment core. Non-glacial lake conditions were restored for about 1000 years before the water level in Cabin Lake lowered and the core site became a fen. The fen indicates drier-than-present conditions leading up to the Holocene thermal maximum. An unconformity spanning 5400 years during the mid-Holocene is overlain by peat until 1110 CE when meltwater from Sheridan Glacier returned to the basin. Three intervals of an advanced Sheridan Glacier are recorded in the Cabin Lake sediments during the late Holocene: 1110-1180, 1260-1540 and 1610-1780 CE. The sedimentary sequence also contains the first five reported tephra deposits from the Copper River delta region, and their geochemical signatures suggest that the sources are the Cook Inlet volcanoes Redoubt, Augustine and Crater Peak, and possibly Mt Churchill in the Wrangell Volcanic field.

Original languageEnglish (US)
Pages (from-to)761-771
Number of pages11
JournalJournal of Quaternary Science
Volume28
Issue number8
DOIs
StatePublished - Nov 2013

Fingerprint

Holocene
glacier
lake
fen
meltwater
outwash
Hypsithermal
tephra
sedimentary sequence
unconformity
crater
sediment core
lacustrine deposit
peat
water level
volcano
Late Holocene
Glacier
Early Holocene
Fluctuations

Keywords

  • Lake sediment
  • Little Ice Age
  • Quaternary stratigraphy
  • Sheridan Glacier
  • Tephrochronology

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology
  • Arts and Humanities (miscellaneous)

Cite this

Early and late Holocene glacial fluctuations and tephrostratigraphy, Cabin Lake, Alaska. / Zander, Paul D.; Kaufman, Darrell S; Kuehn, Stephen C.; Wallace, Kristi L.; Anderson, Scott R.

In: Journal of Quaternary Science, Vol. 28, No. 8, 11.2013, p. 761-771.

Research output: Contribution to journalArticle

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