A 2200-yr record of hydrologic variability from Foy Lake, Montana, USA, inferred from diatom and geochemical data

Auteurs :
STEVENS, L.R.
STONE, J.R.
CAMPBELL, J.
FRITZ, S.C.

Description :
A 2200-yr long, high-resolution record of drought variability in northwest Montana is inferred from diatoms and δO 18 values of bio-induced carbonate preserved in a varved lacustrine core from Foy Lake. A previously developed model of the diatom response to lake-level fluctuations is used to constrain estimates of paleolake levels derived from the diatom data. Spectral analysis of the δO 18 data indicates that severe droughts occurred with multi-decadal (50 to 70 yr) frequency.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2006, vol. 65, n°. 2, p. 264-274, nombre de pages : 11, Collation : Illustration, Références bibliographiques : 39 ref.

Date :
2006

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier