| Abstract: | The evaluation of volcanic hazards for the proposed Safety Test Reactor Facility (STF) at the Argonne National Laboratory-West (ANLW) site, Idaho National Engineering Laboratory (INEL), Idaho, involves an analysis of the geology of the Lava Ridge-Hells Half Acre area and of K-At age determinations on lava flows in cored drill holes. The ANLW site at INEL lies in a shallow topographic depression bounded on the east and south by volcanic rift zones that are the locus of past shield-type basalt volcanism and by rhyolite domes erupted along the ring fracture of an inferred rhyolite caldera. The K-At age data indicate that the ANLW site has been flooded by basalt lava flows at irregular intervals from perhaps a few thousand years to as much as 300,000-400,000 years, with an average recurrence interval between flows of approximately 80,000-100,000 years. At least five major lava flows have covered the ANLW site within the past 500,000 years. |
| Genre: | USGS Numbered Series |
| ProdID: | 9913 |
| Citation Author: | Kuntz, Mel A.; Dalrymple, G. Brent |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 66 leaves, [9] leaves of plates :ill. (some col.), maps ;28 cm.; (72 p. - PGS) |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 79-1657 |
| Citation Search Results Text: | Geology, geochronology, and potential volcanic hazards in the Lava Ridge-Hells Half Acre area, eastern Snake River Plain, Idaho; 1979; OFR; 79-1657; Kuntz, Mel A.; Dalrymple, G. Brent |
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| Citation Year: | 1979 |
| Type: | citation/reference |
| Text: | Geology, geochronology, and potential volcanic hazards in the Lava Ridge-Hells Half Acre area, eastern Snake River Plain, Idaho; 1979; OFR; 79-1657; Kuntz, Mel A.; Dalrymple, G. Brent |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1979/1657/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1979/1657/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
