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Undergraduate Research Project Management System

Source and Transport of Granite Glacial Erratics in Chugach Mountains

Status Complete
Seeking Researchers No
Start Date 09/01/2005
End Date 06/30/2006
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Funding Amount
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Last Updated 07/05/2008 01:25AM


  Kristine Crossen

Student Researchers
  Joshua Anderson


The purpose of this research proposal is to determine the source origin of granitic glacial erratics that are deposited on the Chugach Mountains to the east of Anchorage, Alaska. The closest sources of granite for the erratics lie hundreds of kilometers away in a variety of directions. This suggests that glaciers advanced to Anchorage from one of these directions. If the source of these rocks can be established, the results could have profound implications regarding the glacial history of south central Alaska. Four potential sources for the Anchorage granitic erratics have been recognized. The geochemical, petrographic, and age characteristics of each of these areas are well-documented. By conducting similar analysis methods on these granitic erratics, I hope to trace them to their source by comparing our results with published data. Once the source has been identified, a basic glacial flow model will be developed and used to assist in the determination of past glacial flow patterns in the upper Cook Inlet region and southcentral Alaska. This model will be compared with existing Anchorage glacial flow models to confirm whether it supports or contrasts with previous glacial studies. No previous studies have been conducted on the sources of granitic glacial erratics in southcentral Alaska. The results of this research project will enhance our knowledge and understanding of how glacial flow patterns have influenced Anchorage and the surrounding areas.

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