Session No. 157
Tuesday, 12 October 2021: 9:00 AM-1:00 PM
Exhibit Hall A (Oregon Convention Center)
T24. The Life and Times of Arc Volcanoes from Bottom to Top (Posters)
GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division; Geochemical Society
Authors will be present from 11 AM to 1 PM.
NEW GEOLOGIC MAPPING IN THE TENALQUOT PRAIRIE AND VAIL QUADRANGLES, WASHINGTON, INDICATES THAT CASCADE ARC VOLCANISM STARTED ABOUT 46 MA, ASSOCIATED VOLCANIC DEPOSITS LIKELY FILLED AN EOCENE FAULT-BOUNDED TACOMA BASIN NORTHEAST OF THE OLYMPIA STRUCTURE, PRE-VASHON DEPOSITS HERE EXTEND SEVERAL KILOMETERS FARTHER SOUTH THAN VASHON DEPOSITS, AND HIGH-VOLUME MELTWATER DISCHARGE MARKED THE GLACIAL ICE MARGIN
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