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GEOL 2207 (204)
J.Finnis (74)
Lecture

History of Impacts.docx

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Department
Geology
Course
GEOL 2207
Professor
J.Finnis
Semester
Summer

Description
History of Impacts Gene Shoemaker - Studied features such as material thrown out of crater (ejecta), shocked quartz and chemical anomalies - With help of satellite imagery, we can begin to identify craters on Earth’s surface Manicougan impact crater - Northern Quebec - Formed 214 million years ago in late Triassic - 70 km diameter, but could been 100 km before glacial erosion stripped away upper levels - Associated with 4 others including: o Saint Martin Crater (Manitoba) o Rouchechouart Crater (France) - All craters lined up in late Triassic (their locations back then) o THIS may repre
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