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R.J. Hackman

Publications and source records attributed to R.J. Hackman.

At least 19 recordsLinked to original sources
USGS1965

Photointerpretation of Alaskan post-earthquake photography

Aerial photographs taken after the March 27, 1964, Good Friday, Alaskan earthquake were examined stereoscopically to determine effects of the earthquake in areas remote from the towns, highways, and the railroad. The two thousand black and white photographs used in this study were taking in April, after the earthquake, by the U. S. Coast & Geodetic Survey and were generously supplied to the U. S. Geological Survey. Part of the photographs, at a scale of 1/24,000, provide blanket coverage of approximately 2,000 square miles of land area north and west of Prince William Sound, including parts of the mainland and some of the adjacent islands. The epicenter of the earthquake, near the head of Unakwik Inlet, is located in this area. The rest of the photographs, at scales ranging from 1/17,000 to 1/40,000, cover isolated strips of the coastline of the mainland and nearby islands in the general area of Prince William Sound. Figure 1 shows the area of new photo coverage used in this study. The objective of the study was to determine quickly whether geological features resulting from the earthquake, such as faults, changes in shoreline, cracks in surficial material, pressure ridges in lake ice, fractures in glaciers and lake ice, and rock slides and avalanches, might be identifiable by photointerpretation. The study was made without benefit of comparisons with older, or pre-earthquake photography, which was not readily available for immediate use.

Alaska↗
USGS1962

Astrogeologic studies, semiannual progress report, February 26, 1961 to August 24, 1961

This report is the second semiannual report on a geological program of research conducted by the Geological Survey on behalf of the National Aeronautics and Space Administration. This research is being carried out under the Branch of Astrogeology. The long-range objectives of this program are to determine and map the stratigraphy and structure of the Moon's crust, to develop basic information on processes that have led to the present condition of the Moon's surface, and to work out the sequence of events in the geologic history recorded in the Moon's stratigraphy and structure. The work includes three closely interrelated areas of study: (1) investigation of the chemistry, petrography, and physical properties of extraterrestrial materials that may have been derived from the Moon, such as tektites, certain types of meteorites, and extraterrestrial dust; (2) experimental and field investigations of the mechanics and phenomena of impact of high-speed objects and of cratering; and (3) geologic mapping of the Moon. Immediate objectives for the fiscal year 1961 have included the preparation of geologic maps for the nominal target area for the Ranger Project of the National Aeronautics and Space Administration. Field and laboratory work on craters was directed toward developing data and an adequate theory for the integrated effect of meteoroid bombardment of the lunar surface. Special attention has been given to phase changes and solid state changes produced in rock by meteorite impact. American and Philippine tektites were the principal materials of possible lunar origin to receive detailed petrographic and chemical analysis.

Open-File Report↗