Glacial deposits, undifferentiated
Glacial deposits, undifferentiated
Quaternary
Undifferentiated glacial deposits occurring within the higher elevations of the range. Includes glacial moraines, till, and outwash deposits; also includes rock glaciers and (locally) ice fields and intermixed talus or colluvial material. Variably unsorted (till, moraines) to well sorted (outwash); unconsolidated to weakly or moderately consolidated; boulder to clayey gravel, sand and silt. Depending on age, clasts may be slightly to extensively weathered, and glacial morphology may be pronounced, subdued or absent. Age ranges from early Pleistocene to Holocene (e.g., Clark and Gillespie, 1997; James and others, 2002; Hildreth and others, 2018). Includes deposits associated with many named glacial stages.