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J. C. Behrendt

Publications and source records attributed to J. C. Behrendt.

6 recordsLinked to original sources
USGS1992

Gravity modelling across the Transantarctic Mountains, Northern Victoria Land

During GANOVEX V and GANOVEX VI, new gravity data were collected in northern Victoria Land. The GANOVEX V data cover the Mt. Melbourne 1:250.000 quadrangle, while the GANOVEX VI data Transantarctic Mountains south of the Drygalski Ice Tongue. The two data sets are connected by a coastal traverse. The measurements were constrained by satellite-positioned elevation (GPS) data and, in some cases, ice depth radar echo-sounding. Complete Bouguer corrections have been attempted to compensate for the effects of rugged terrain and surrounding ice. In the Mt. Melbourne quadrangle the regional gravity gradient is uniform, decreasing inland by 2.0 mgal/km. South of the Drygalski Ice Tongue the regional gradient is 3.0 mgal/km but becomes flat and variable inland over Beacon Supergroup rocks. Both profiles are consistent with a flexural uplift crustal model. A coast-parallel gravity profile reveals a long-wavelength anomaly of approximately 100 mgal amplitude, which is likely caused by a deep seated source. Gravity models suggest that crustal thickening on the order of 5.0 km to 5.5 km at the coastline between Terra Nova Bay and the region south of the ice tongue could account for the coastal anomaly. The increase in thickness might lie across two "domains" of different uplift, or perhaps in some way be related to a structure dating from the time of the Gondwana breakup.

Book chapter↗
USGS1969

Seismic-refraction measurements in Jackson Hole, Wyoming

Three reversed seismic-refraction profiles were recorded in the Jackson Hole, Wyoming, area during July 1964. The seismic model which was developed consists of three layers with velocities of 2.4 km/sec for Tertiary and Cretaceous rocks above the Cleverly Formation (Lower Cretaceous), 3.8 km/sec for rocks from Lower Cretaceous down to lower Paleozoic, and 6.1 km/sec for lower Paleozoic (limestones and dolomites) and Precambrian rocks. The maximum thickness of sediments in Jackson Hole is 5 km, and the minimum throw of the Teton fault in the area covered by this survey is about 7 km.

Wyoming↗