Article ID Journal Published Year Pages File Type
8946351 Geomorphology 2018 56 Pages PDF
Abstract
The glacial deposits at Jones Point, located on the western side of the lower Hudson River, New York, were investigated with geologic, geophysical, remote sensing and optically stimulated luminescence (OSL) dating methods to build an interpretation of landform origin, formation and timing. OSL dates on eight samples of quartz sand, seven single-aliquot, and one single-grain of quartz yield an age range of 14-27 ka for the proglacial and glaciofluvial deposits at Jones Point. Optical age results suggest that Jones Point deposits largely predate the glacial Lake Albany drainage erosional flood episode in the Hudson River Valley ca. 15-13 ka. Based on this data, we conclude that this major erosional event mostly removed valley fill deposits, leaving elevated terraces during deglaciation at the end of the Last Glacial Maximum (LGM). Our analysis supports the earlier 15 ka date for the flood occurrence and suggests that more recent overlying glaciofluvial deposits formed in the lee-side of the Jones Point promontory.
Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Earth-Surface Processes
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