The Origin and Distribution of Subbottom Sediments in Southern Lake Champlain
- 1 September 1980
- journal article
- research article
- Published by Cambridge University Press (CUP) in Quaternary Research
- Vol. 14 (2) , 224-239
- https://doi.org/10.1016/0033-5894(80)90050-2
Abstract
Three units, correlatable with recent Lake Champlain, late-glacial marine Champlain Sea, and proglacial Lake Vermont sediments, have been identified from about 200 km of high-resolution seismic reflection profiles and eight piston cores collected in southern Lake Champlain. Lake Vermont deposits are nonfossiliferous and range from thin to absent nearshore and on bedrock highs to more than 126 m thick near Split Rock Point. Champlain Sea sediments contain marine foraminifers and ostracodes and are fairly uniform in thickness (20–30 m). Recent Lake Champlain sediments range in thickness from 0 to 25 m. Average sedimentation rates for Lake Vermont are considerably higher (4–8 cm/yr) than those for the Champlain Sea (0.8–1.2 cm/yr) and Lake Champlain (0.14–0.15 cm/yr). Bedrock, till, and deltaic and alluvial deposits were also identified on the acoustic records but were not sampled. An unconformity separating Champlain Sea deposits from Lake Champlain deposits is associated with numerous benches at water depths of 20–30 m. These benches, the alluvial deposits, and the onset of deltaic deposition are probably associated with a low water level stillstand at the close of the Champlain Sea episode.This publication has 9 references indexed in Scilit:
- Champlain Sea Foraminifera and Ostracoda: a systematic and paleoecological synthesisGéographie physique et Quaternaire, 2010
- Distribution of pollutants from a new paper plant in southern Lake Champlain, Vermont and New YorkEnvironmental Geology, 1977
- Late-Wisconsin Marine Environments of the Champlain Valley (New York, Quebec)Quaternary Research, 1977
- An Arctic foraminiferal fauna from Champlain Sea deposits in OntarioCanadian Journal of Earth Sciences, 1976
- Possible evidence for contemporary doming of the Adirondack Mountains, New York, and suggested implications for regional tectonics and seismicityTectonophysics, 1975
- Late Pleistocene Benthic Foraminifera of the Southern Champlain Sea: Paleotemperature and Paleosalinity IndicationsAtlantic Geology, 1974
- Luzerne Readvance near Glens Falls, New YorkGSA Bulletin, 1971
- Radiocarbon dates, Mya arenaria phase of the Champlain SeaCanadian Journal of Earth Sciences, 1969
- A radiocarbon-dated marine algal bed of the Champlain Sea episode near Ottawa, OntarioCanadian Journal of Earth Sciences, 1968