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Page 6370, results 159226 - 159250

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Publication Extents

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Summary of geologic effects of the Boxcar event, Nevada Test Site
Dayton Delbert Dickey, F. A. McKeown, William H. Ellis
1969, Open-File Report 69-74
A high-yield underground nuclear explosion at the U20i site, formed a sink 1,000 feet in diameter above the explosion point. Fractures opened as far as 20,000 feet from the explosion and rock-falls occurred as far as 15 miles. Most fractures were coincidental with north-trending naturally occurring faults. Maximum displacement along...
Preliminary geologic interpretation of aeromagnetic data in the Yakutat district, Alaska
Gordon Robert Francis Johnson, George Plafker
1969, Open-File Report 69-134
An aeromagnetic survey covering portions of the Yakutat Feveland region in south-central Alaska was made to delineate concentrations of magnetic minerals possibly associated with heavy mineral placers in beach sands and raised beach ridges. However, the larger magnetic anomalies do not correlate with the beach placers in the surveyed area....
The talc, soapstone, and asbestos deposits of Massachusetts
Newton Earl Chute
1969, Open-File Report 69-39
Several talc and soapstone deposits were worked in Massachusetts from about 1810 to 1922. Most of these deposits are in the Chester Amphibolite, or in serpentine lenses in or adjacent to the amphibolite along a belt that extends north-south across the State from Rowe to West Granville; it appears...