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Map of Glacial and Postglacial Deposits California
Map This document is the "Map of Glacial and Postglacial Deposits in Yosemite Valley, Mariposa County, California," published by the United States Geological Survey (USGS) in 1930.Document Overview Author / Geologist: This detailed geological layout was surveyed and created by the renowned geologist François E. Matthes. Context: It was featured as Plate 29 in his seminal work, Professional Paper 160: Geologic History of the Yosemite Valley.Coverage: Centered along the Merced River, the map stretches across Yosemite Valley from Elephant Rock on the west end up to Clouds Rest on the east.Notable Cartographic Details Glacial Mapping: The map categorizes the valley floor and surrounding heights into specific eras of glaciation, explicitly delineating areas that remained "unglaciated" during major ice ages, such as El Capitan, Clouds Rest, and Half Dome.Left-Hand Insets: The upper left section features an extensive geological Explanation (Legend) key, an altitude registry for principal points, and a localized locator map pinpointing Yosemite's position within California
Map of Glacial and Postglacial Deposits California - Before (Poster)
Before