Geology topics

B. L. Tibbetts

Publications and source records attributed to B. L. Tibbetts.

2 recordsLinked to original sources

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↗

USGS1964

Lake Superior seismic experiment

During the Lake Superior seismic experiment, an International Upper Mantle cooperative program in July 1965, the U. S. Geological Survey provided a total of 8 mobile seismic-recording systems. For the first phase of the experiment the systems were arranged in two groups of 4; one group at the western end of the lake near Duluth and the other was on the Keweenaw Peninsula. During the last three days of the experiment all 8 systems were located at various positions in parts of Wisconsin and Minnesota. Selected sections of 500 seismograms are presented.

Lake Superior↗