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William A. Fischer

Publications and source records attributed to William A. Fischer.

17 recordsLinked to original sources

Progress in remote sensing as it applies to missions of Committee for Coordination of Joint Prospecting for Mineral Resources in Asian Offshore Areas

The major thrusts of investigations of the use of space data for understanding our Earth continue to focus on the land and near-shore environments. This is expectable; people live on the land, draw most of their resources from the land or near-shore areas, and in these areas environmental degradation or improvement are most clearly observable. An exception to this focus of investigation was the launch of Seasat, a satellite dedicated to marine investigations. Seasat was short lived but the data produced strongly supported the use of imaging radar for land investigation, and, although studies are incomplete, suggest eventual benefits for the navigator, searchers for marine resources, and mariners--provided that the data and/or interpretations can be available to the marine users shortly after collection. In this regard, the positive steps now being taken in Southeast Asia to establish reception, processing, and interpretation centers are a major development.

Open-File Report

EROS: investigations from space

The Earth Resources Observation Satellite Program of the Geological Survey and NASA will enable earth-bound scientists to learn more about natural resources-particularly about ground water resources.

Ground Water Resources Institute Quarterly

Ultraviolet investigations for lunar missions

Preliminary field tests of an active ultraviolet imaging system have shown that it is possible to produce linages of the terrain from distances as great as 75 feet by means of reflected ultraviolet light at wavelengths longer than 3300 A. Minerals that luminesce when exposed to ultraviolet energy have been detected from distances as great as 200 feet. With appropriate design modifications, it may be possible to utilize a similar system in detecting luminescing minerals from greater distances. Also, with a similar system and appropriate auxiliary equipment such as image intensifiers, it may be possible to discriminate between naturally occurring materials on the basis of reflected ultraviolet energy at wavelengths shorter than 3000 A. In this part of the spectrum image contrast for some rock types may exceed that from visible light. Information from these and related ultraviolet spectralanalysis studies may be useful in evaluating data obtained from passive ultraviolet systems in lunar orbit as well as from active systems on the lunar surface.

Advances in Astronautical Sciences

Geological exploration from orbital altitudes

The National Aeronautics & Space Administration is planning geologic exploration from orbiting spacecraft. For that purpose it is evaluating new and refined exploration tools, often called remote sensors, including devices that are sensitive to force fields, such as gravity gradient systems, and devices that record the reflection or emission of electromagnetic energy. Both passive electromagnetic sensors (those that rely on natural sources of illumination, such as the Sun) and active electromagnetic sensors (which use an artificial source of illumination) are being considered.

Geotimes

Review of the stratigraphy and structure of the Gubik anticline

At the direction of Ralph L. Miller, a special study was made of part of the Gubik anticline east of the Colville River. The purpose of this study was two fold; first, the examine the field evidence bearing on east plunge, second, to attempt to establish the continuity of the anticlinal axis from the Colville River to the Anaktuvuk River. The results of this study and a summary of results of the study of part of the anticline west of the Colville River by Stefansson and Thurrell 1/ are presented below.

Alaska

Review and photogeologic evaluation of some selected anticlines in the Maybe Creek area

The following report presents in tabulated form the location, structure, and stratigraphy of various anticlines in the Maybe Creek area which are presently considered to be reasonably favorable drilling sites, References to mere complete sources of information for each anticline are listed. The accompanying diagram (Fig. 1) presents a generalized stratigraphic picture of the section that would be penetrated by a hole located on the crest of each of these structures. The zonal thicknesses, as shown in this diagram, are average figures and they probably vary from anticline to anticline within this area as they do elsewhere on the North Slope. The thickness of postulated favorable sands and also the stratigraphic horizon reached by each of the proposed 1,500-foot holes may be further affected by the postulated prezone F unconformity. It seems probable that zone E is essentially absent at Umiat. At the Weasel Creek anticline a total of approximately 1,700 feet of zone E sediments appear to be present. This is probably the complete zone E section. Thus the thickness of zone E sediments m4y vary considerably from place to place within the area west of Umiat covered by this report, and these possible variations are not shown in the diagram (Fig. 1). Interpretations of depth and thickness of favorable sands are based on the facies studies of T. G. Payne1/. Discussions presented are limited to Nanushuk Group rocks and no reference is made nor inference intended as to possible favorable stratigaphic or structural conditions in the older sedimentary rocks.

Alaska

The Carbon Creek and Awuna anticlines

At the interim meting of the Technical Committee in Fairbanks, Alaska, in September 1949, the Navy Oil Unit was requested to make photo-geologic analysis of the Driftwood, Awuna, and Carbon Creek anticlines before the November meeting. A report on the photogeology of the Driftwood anticline, based on available air photos, has already been distributed. The present report considers the geology of the Carbon Creek and Awuna anticlines. The central part of the Carbon Creek anticline was studied in the field by party No. 2 during the 1949 season. A geologic report on this part of the anticline, by C. L. Whittington and Samuel A. Keller, will be distributed at the November meeting. The present photogeologic report covers the part of the Carbon Creek anticline from the western end of Whittington and Keller's area westward to the point where the Carbon Creek anticline plunges and disappears. A photogeologic map (fig. 1) accompanies this report and incorporates all available data both from the aerial photographs and from earlier field geologic studies of a part of the anticline by Thompson and Barksdale. The Awuna anticline has been mapped in the field by C. L. Whittington. A field geologic map of the anticline will be distributed at the November meeting. The discussion on the Awuna anticline in the present report is based in part on the field observations of Whittington and in part on a new study of the aerial photographs which had previously been studied by Whittington. In reading this section on the Awuna anticline, reference should be made to Whittington's geologic map, which will be available at the November meeting. At the present time, only trimetrogon photography is available for study of the western part of Carbon Creek and the Awuna anticline areas. Hence quantitative analysis of the structures is not possible, although rough estimates of the amount of plunge and of closures can be made. Accurate calculations of closure and plunge by photogrammetric methods must await the arrival of the vertical photographs of the area

Alaska

The Driftwood anticline

Recent interest in the anticlines near the headwaters of the Utukok River has prompted the issuance of two special reports. This, the first of the two reports, deals with the Driftwood anticlines, the second will consider the Awuna anticline and the western part of the Carbon Creek anticline. At present, only trimetrogon photography is available in this area. This limits the accuracy and completeness of the photographic studies. Vertical photos were flown this summer but they will probably not be available for study before the November meeting. At such time as they are retrieved a more thorough photo investigation will be made.

Alaska

Stratigraphy and structure of the area of Maybe Creek

During the summer of 1946 the United States Geological Survey continued its program of stratigraphic and structural investigations in Naval Petroleum Reserve No. 4, northern Alaska. This report summarizes the results of work in the area of Maybe Creek (see inset, fig. 1). The area studied is southwest of Umiat and includes about 500 square miles lying generally between the headwaters and mouth of Maybe Creek. Structural data covering approximately 250 square miles of this area has been compiled from aerial photographic studies. The area is bordered generally on the north by the lake country and on the west by the Ikpikpuk River. Most of the area is north of Maybe Creek except for that part extending for 6 miles south of Maybe Creek between longitudes 153° 30' W. and 154° 20' W. The latitude of Maybe Creek is about 69° 15' N. The stream flows generally westward and at longitude 154° 40' W. unites with the eastward-flowing Kigalik River to form the Ikpikpuk River, which has a northerly course across the Arctic Slope to the ocean.

Alaska