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Showing 1 to 1 of 1 for “"Geology -- Oregon -- Wheeler County"”.
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Geology in the Vicinity of the City of Fossil, Wheeler County, North-Central Oregon
… Blue Mountains Anticlinorium in north-central Oregon. The primary geologic problems investigated were: 1) the age and stratigraphic position of leaf-bearing tufts mapped as Oligo-Miocene John Day Formation but surrounded by andesitic basalts of the Eo-Oligocene Clarno Formation, 2) the age of …