![]() ![]() The Miocene Columbia River Basalt Group (CRBG) is the youngest and best preserved continental flood basalt province on Earth, linked in space and time with a compositionally diverse succession of volcanic rocks that partially record the apparent emergence and passage of the Yellowstone plume head through eastern Oregon during the late Cenozoic. ![]() 33 refs., 2 figsįield-trip guide to Columbia River flood basalts, associated rhyolites, and diverse post-plume volcanism in eastern Oregonįerns, Mark L. The patterns in the volume and spatial distribution of these basaltic volcanic episodes in the central and southern part of the SNVF are used as a basis for forecasting potential future volcanic activity in vicinity of Yucca Mountain. Field and geochronologic data for the basaltic rocks define two distinct episodes. This interval largely postdates the major period of silicic volcanism and coincides with and postdates the timing of major extensional faulting in the region. The purpose of this paper is to summarize briefly the distribution and geologic characteristics of basaltic volcanism in the Yucca Mountain region during the last 10-12 Ma. International Nuclear Information System (INIS) Basaltic volcanic episodes of the Yucca Mountain region ![]()
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