U-Pb Geochronology of Ledge Mountain, Adirondacks
By: Laura Horsley
Department: Geoscience
Faculty Advisor: Dr. Mary Leech
Ledge Mountain is located near the town of Indian Lake in the Adirondack Mountains. The Adirondacks are a southern extension of the Grenville Province, an area of major collision that spanned more than 200 million years. This series of large scale orogenies resulted in anatexis, deformation, and high-grade granulite facies metamorphism that produced migmatites across the region. A migmatite is a mixed high-grade metamorphic rock that is made of a parts affected by anatexis. Using U-Pb geochronology and petrography we will reconstruct the metamorphic events undergone at Ledge Mountain.