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Geologist briefs Pine County board on Snake River geology, erosion risks and land‑use links to water quality
Summary
A geologist told commissioners that bedrock, glacial deposits and historic drainage events control the Snake River's behavior, that some reaches are prone to erosion and warming, and that setbacks and vegetation can reduce bluff failures and sediment delivery.
County officials heard a geological briefing on the Snake River watershed that linked deep geology, glacial history and modern land uses to river erosion and water quality. Carrie Jennings, a consulting geologist who mapped Pine County, said bedrock variations and glacial deposits determine where the river meanders, where lakes and low‑gradient reaches form and where bluffs are vulnerable to failure. Jennings explained that parts of the county are underlain by basalt flows and by Permian and older sandstones…
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