Evidence of Glacial Erosion in the Landscape

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Presentation transcript:

Evidence of Glacial Erosion in the Landscape

Evidence of Glacial Deposition in the Landscape

Palisades Glacier, Sierra Nevada Mountains, CA

Glacial Geology – Landscape Features

Glacial Scour Grinnell Glacier, Montana

Glacial vs. Fluvial Erosion/Evacuation Rates

Proglacial Stream Discharge Fluctuation

Bench Glacier, Alaska - June 2000 Bench Glacier, Alaska - September 2000

Observations of downvalley surface motion, uplift, and proglacial discharge

Abrasion

Abrasion – Effect of Relative Clast Sliding Speed

Quarrying – a.k.a. Plucking

Sub-glacial water pressure variability

Play Subglacial Flow Movie from Grinnell Glacier, Montana /Users/pna/Work/Teaching/Animations/grinnel_cd.mov

Glacial Landscape Evolution Model Schematic

Cross Valley Glacial Profile Evolution

Numerical Models of Glacial Long Valley Profile Evolution

Grewink Glacier, Southcentral Alaska – overdeepening

Long Profiles With Hanging Valley Profiles

Numerical Modeling of Glacial Long Profile Evolution Play Kelly MacGregor’s Matlab Simulations /Users/pna/Work/Teaching/Animations/glacdeepen.mov /Users/pna/Work/Teaching/Animations/glactrib.mov