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Abstract: At least three sets of moraines mark distinct glacial stands since the last glacial maximum (LGM) in the Three Sisters region of the Oregon Cascade Range. The oldest stand predates 8.1 ka (defined here as post-LGM), followed by a second between ∼2 and 8 ka (Neoglacial) and a third from the Little Ice Age (LIA) advance of the last 300 years. The post-LGM equilibrium line altitudes were 260±100 m lower than that of modern glaciers, requiring 23±9% increased winter snowfall and 1.4±0.5°C cooler summer temperatures than at present. The LIA advance had equilibrium line altitudes 110±40 m lower than at present, implying 10±4% greater winter snowfall and 0.6±0.2°C cooler summer temperatures. [Copyright &y& Elsevier]

Investigates Pleistocene fluvial incision rates in the western United States using Lava Creek B tephra. Rock uplift and endogenic processes; Climate during and after deposition of the Lava Creek B ash; Length of calculated rates of incision; Middle to late Pleistocene changes in incision rates.

Describes the links between late Pleistocene climate change and mass movements in northern New Mexico. Lacustrine deposits; Effects of glacial melt and pluvial activity; Evidence of landscape response in well-dated lacustrine deposits.