Keesville varves

Country:

USA

Region:

New York

Lake type:

glacial

Category: clastic varves

Elevation:

131 m asl

Archive type:

lacustrine sediments

Reference:

Ridge, J.C. (March 22, 2015) The North American Glacial Varve Project

Link to reference or DOI:

http://eos.tufts.edu/varves


Site images

The North American Glacial Varve Project > max. resolution

Basal varves overlying till at Keesville, NY in the Champlain Valley. The bottom three varves resting on till (arrows mark winter layers, right-most core) are very thick and sandy as compared to the sequence immediately above that shows a thinning of annual layers. Varves get progressively younger (right to left) in this sequence of over-lapping cores. Dots show equivalent layers on adjacent cores. > max. resolution

To construct a varve record in glacial lacustrine sediment the thicknesses of annual layers are counted and measured to formulate a time scale of varve years and corresponding varve thickness. The block of sediment shown here is from the deposits of Lake Vermont, a late Pleistocene glacial lake that occupied the Champlain Valley of New York. > max. resolution

Left: High resolution color (RGB) image of dried varve core with image sampling profile line that is 20 pixels wide. (W = winter layers). Right: Gray scale version (total RGB values) of high resolution image. > max. resolution