Ontario, Canada

This project focuses on the geology of the Bancroft area of Ontario, which is thought to have been the margin of North America during the Mesoproterozoic. This part of the Grenville Province of Ontario is made up of two tectonic elements: (1) High-grade gneisses that were part of the 1.7-1.4 Ga continental margin and (2) a package of volcanic, plutonic, and sedimentary rocks that are thought to be a collage of arc components accreted at ca. 1.17 Ga. This Keck project focuses on this arc assemblage and its collision + suture with North America.

South-Central Alaska

A study of the tectonic evolution of the Campanian-Eocene Chugach-Prince William (CPW) terrane in southern Alaska. This project has several distinct objectives that include: 1) understanding the regional depositional setting and source for of the CPW flysch; 2) understanding the intrusive history of this belt; and 3) determining the age and origin of the Knight Island ophiolite.

Peruvian Andes

We will generate continuous records of mountain glaciation in Peru that span the Holocene (~12 ka to present) through an approach that combines the acquisition and analysis of lake sediment cores with moraine dating using both lichenometry and cosmogenic radionuclides (10Be and 26Al). The pairing of paleolimnology with moraine dating will enable determination of both the timing and magnitude of ice margin changes through the Holocene with sufficient precison to enable rigorous testing of hypotheses concerning the causes of abrupt climate change in the tropics.

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