Morrison Rocks [SEP] continent
Morrison Rocks
The Morrison Rocks () are a group of rocks which outcrop along the southern slope of Mount Frakes, in the Crary Mountains of Marie Byrd Land, Antarctica. They were mapped by the United States Geological Survey from ground surveys and U.S. Navy aerial photographs, 1959–66, and were named by the Advisory Committee on Antarctic Names for Paul W. Morrison, U.S. Navy, a hospital corpsman at South Pole Station in 1974.
accumulating sedimentary rocks on a basement of 1.8 billion year old Churchillian rocks.
Geologic History, Stratigraphy & Tectonics Mesozoic (251-66 million years ago).
Carbonate deposition common in the Paleozoic ended during the Jurassic as the North American continent moved westward with the opening of the Atlantic Ocean. The Guichon Batholith emplaced 200 million years ago, near Ashcroft, British Columbia and was accompanied by a period of erosion that wore away Devonian, Mississippian and Traissic strata from east to west. The Late Jurassic Morrison Formation, known for