Crustal Structure along the Great Basin-Colorado Plateau Transition from Seismic Refraction Profiling.
Progress rept. 1 May 72-1 Jun 73,
UTAH UNIV SALT LAKE CITY DEPT OF GEOLOGICAL AND GEOPHYSICAL SCIENCES
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A seismic refraction profile was recorded along the southern Wasatch Front, Utah, to investigate crustal structure in the transition zone between the Great Basin and the Colorado Plateau. Interpretation of refracted and reflected phases indicates a thin, 25 km crust, a low Pn velocity of 7.4 km per second and a crustal low-velocity zone. This model along with other geophysical data, is interpreted as evidence for a mantle upwarp that extends at least 50 km east of the physiographic boundary and is coincident with the Intermountain seismic belt. Identification of the crustal low-velocity layer documents this anomalous crustal feature throughout the transition zone between the Great Basin and the Middle Rocky Mountain-Colorado Plateau provinces in Utah. Author
- Geology, Geochemistry and Mineralogy