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Full-Text Articles in Earth Sciences

Quaternary Geology Of Portions Of The Mcgregor Peak, Murr Peak, Marion, And Hubbart Reservoir, 7.5’ Quadrangles, Flathead County, Montana, Carlos Montejo Jul 2021

Quaternary Geology Of Portions Of The Mcgregor Peak, Murr Peak, Marion, And Hubbart Reservoir, 7.5’ Quadrangles, Flathead County, Montana, Carlos Montejo

Graduate Theses & Non-Theses

Quaternary deposits in the northern Little Bitterroot River watershed record the advance and retreat of the Cordilleran Ice Sheet, transgression of Glacial Lake Missoula, and at least one partial or complete drainage of Glacial Lake Missoula during the last Pleistocene glaciation. New geologic mapping at a scale of 1:24,000 in portions of the McGregor Peak, Marion, Murr Peak, and Hubbart Reservoir quadrangles with a focus on Quaternary deposits has refined boundaries for where the Cordilleran Ice Sheet and Glacial Lake Missoula coincided. Stratigraphic analysis of three measured sections within Glacial Lake Missoula sediments along with three optically stimulated luminescence ages …


Quaternary Geology Of The Cabinet, Heron And Smeads Bench 7.5’ Quadrangles, With Emphasis On Glacial Lake Missoula Sediments, Emily Welk Apr 2019

Quaternary Geology Of The Cabinet, Heron And Smeads Bench 7.5’ Quadrangles, With Emphasis On Glacial Lake Missoula Sediments, Emily Welk

Graduate Theses & Non-Theses

The primary scientific purpose of this project was to improve geologic knowledge of valley-fill units in the most downstream portion of the Clark Fork River valley in Montana. This was done to help understand the history of glacial Lake Missoula filling and draining cycles in the vicinity of the dam. The secondary purpose was to make a geologic map of the Cabinet, Heron and Smeads Bench 7.5-minute quadrangles and to resolve differences between detailed maps of Idaho (Lewis and others, 2008) and the old map of the Smeads bench, Heron and Cabinet quadrangles in Montana (Harrison and others, 1992; mapping …