Physical Sciences and Mathematics Commons^™

Glacial Chronology And Paleoclimatic Significance Of Cirque Moraines Near Mts Baker And Shuksan, North Cascade Range, Wa, Robert A. (Robert Allen) Burrows

WWU Graduate School Collection

Moraines of at least two ages occur in alpine cirques near the Mt. Baker volcano in the North Cascades Range, WA. The south Swift Creek cirque preserves a distinct sequence of moraines representing the two primary age groups. In south Swift Creek cirque, the upper group of moraines (1450-1550 m) has little soil development and vegetation. Increment borings of the oldest trees growing on the upper moraines suggest that they were formed between the late 1800s and early 1900s. This age range correlates with numerous late Little Ice Age (LIA) moraines elsewhere in the Cascade Range. The south Swift Creek …