Accession Number:

AD0735670

Title:

Project Pre-Gondola I: Crater Studies: Carter Measurements. Part I.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER NUCLEAR CRATERING GROUP LIVERMORE CALIF

Personal Author(s):

• Harlan,Ronald W.

Report Date:

1967-12-01

Pagination or Media Count:

88.0

Abstract:

Project Pre-Gondola I, a series of four 20-ton high explosive cratering detonations, was conducted by the U.S. Army Engineer Nuclear Cratering Group during October and November 1966 in order to determine the cratering characteristics of the Pre-Gondola project site located about 18 miles south of the town of Glasgow, Valley County, Montana. The essentially flat site medium consisted of uncemented, highly compacted, moderately jointed shale of the Late Cretaceous age, Bearpaw shale formation. The craters produced were both deeper and wider than those previously observed in either alluvium or basalt, but had flatter slopes. Author

Descriptors:

• *ROCK
• *CRATERING
• SHALE
• CLAY
• TERRAIN
• PHOTOGRAPHS
• EXPLOSIVE CHARGES
• METHANE
• PREDICTIONS

Subject Categories:

• Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE