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At least 523 records · Page 29Linked to original sources
USGS1949

Ostracoda from well, shot hole, and outcrop samples in Naval Petroleum Reserve No. 4

The ostracodes described in this report are from material collected in Naval Petroleum Reserve No. 4, northern Alaska. The samples were obtained from well and seismograph shot holes drilled by Arctic Contractors and United States Geophysical Company and from field samples collected by the United States Geological Survey in the period from 1945 to 1948/ The earliest samples were processed for microfossils in Washington, but most of the material was prepared in the Fairbanks Laboratory of the Geological Survey.

Alaska↗
USGS1949

Heavy mineral zonation of Cretaceous and Tertiary rocks of the central area of northern Alaska

This report presents the general conclusions pertaining to the correlation of Cretaceous and Tertiary rocks in test wells and outcrops in the central area of northern Alaska (fig. 1) by means of heavy minerals. Approximately 1.000 drill and outcrop samples have been studied. In order to relate the materiel here presented to the regional geologic picture of the central area, the restored facies cross-sections A-A' and B-B' of T.G. Payne 1/ are used as a basis for the graphic presentation of the heavy mineral zonation. Section C-C' of Payne is not used because most of it lies outside the area treated in this report and because of new geological and geophysical interpretations in the Barrow area as the result of recent exploration. Instead, the heavy mineral zonation along a somewhat different section C-C' (see fig. 1) is discussed but not illustrated.

Alaska↗
USGS1950

Stratigraphy and structure of the area of the upper Meade River, Alaska

The stratigraphic evidence in the upper Meade River area includes zones B to D of the Nanushuk group (Cretaceous). Zones B and C are not differentiated in mapping and description. South of the Meade River 2,100 feet of zones B-C and 1,500 feet of zone D are exposed. North of the fault zone along the Meade River, the only rocks present, estimated not over 1,000 feet thick, are zone D beds which may be at least in part younger than the zone D rocks south of the Meade River. Sands which barely meet the minimum requirements for potential reservoir beds are present in both zones. South of the Meade River the Kigalik anticline and the Falcon Creek anticline, both sharp-crested folds, trend east. The intervening synclines are broad with low dips on the flanks. Along the Meade River the major structure is a zone of reverse faults, about three-fourths of a mile wide, which brings rocks of zones B-C on the south opposite rocks of zone D on the north. Minimum displacement in this zone is 1,000 feet at longitude 157° 50'W. and 300 feet near the gas-seep lake. North of the fault zone, the Meade River anticline is a rather low fold, so poorly exposed that closure cannot be detected by surface geologic methods.

Alaska↗
USGS1950

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↗
USGS1950

Stratigraphy and structure of the Aupuk anticline

In addition to conducting an examination of the surface geology in the Southern Foothills province between the Killik River and east fork of the Etivluk River, Navy Oil Unit Party No. 5 was requested to map the Aupuk anticline during the 1950 field season, for the purpose of evaluating the petroleum possibilities thereof from the standpoints of favorable statigraphy and possible structural closure. Field mapping of the Aupuk anticline began on August 1, and about 1 month was devoted to the study. Party personnel consisted of G. Donald Eberlein and Charles D. Reynolds, geologists, W. L. D'Olier and W. D. Carter, field assistants, Richard Olson, camp cook, and Max H. Davis, weasel mechanic. Robort M. Chapman, geologist, visited the party for 1 week early in August to help start the work and shared, with Eberlein, the responsibilities associated with the final compilation of this report. Three weasels were used for daily transportation to the field and for moving camp. A 10-foot Link boat equipped with 5 hp. outboard motor was used to cross the Colville River. As field work progressed from west to east it became apparent that the camp equipment and weasels would have to be gotten across the Colville River if field work was to be completed by early September. This crossing was effected without incident at a point approximately 10 miles below the confluence of the Kurupa and Colville Rivers on August 26. The party reached Umiat on September 5.

Alaska↗
USGS1951

Stratigraphy and structure of the upper Siksikpuk - Nanushuk Rivers area

Structural and stratigraphic studies of tha rocks in the Siksikpuk and Nanushuk Rivers area were conducted by Navy Oil Unit party 2 during the summer field season of 1950. The field party consisted of two geologists, two field assistants, a cook, and a weasel mechanic. Three weasels were used for transportation of equipment and personnel. The area examined covers approximately 1,000 square miles of the Arctic Foothills province and lies between the Itkillik River on the east and the Chandler River on the west. The area is drained by the Itkillik, Nanushuk, Anaktuvuk, Siksikpuk, and Chandler Rivers. The mapped area adjoins the Okpikruak and Kiruktagiak Rivers area 1/ to the west. The primary objective of the geologic work in this area was detailed stratigraphic study of pre-Nanushuk group rocks in the Southern Foothills belt as a supplement to the Work begun in the Okpikruak and Kiruktagiak Rivers area in 1949. A secondary objective was areal mapping and structural studies for the purpose of delimiting structures favorable for drilling tests of the Lisburne limestone. Parts of this area had been reconnoitered by members of the U. S. Geological Survey in previous years. In 1901 F. C. Schrader traversed the Anaktuvuk River, In 1945 R. E. Fellows, R. M. Chapman, and C. T. Bressler visited outcrops along the northern margin of the area in the vicinity of the Anaktuvuk River and Kanayut Creek. E. J. Webber and R. L. Detterman examined a few of the cutbanks along the Nanushuk River in 1947; and in 1949 A. L. Bowsher, Sr., and J. T. Dutro mapped an outlier of Lisburne limestone north of Nanushuk Lake.

Alaska↗
USGS1947

Stratigraphy and structure of the area of the Kurupa, Oolamnagavik, Killik, and Colville Rivers

The area between 68° 3C' and 69° 08 N. latitude and between 154° and 155° 20 W. longitude was covered by U. S. Geological Survey party 4 during the period May 18 to September 2. Traverses were confined mainly to the valleys of the Kurupa, Oolamnagavik, and Colville Rivers inasmuch as very little rock is exposed in the interstream areas. This report is a compilation of the field data and of the results of office and laboratory work on rock specimens, fossils, and aerial photographs of the area. An interpretation of the structure and stratigraphy of this area is presented, and possible correlations with the Killik River area to the east are suggested. Some revisions of the conclusions in this report may become necessary in the light of further field work in adjacent areas and heavy mineral studies, but it is believed that any changes will not materially alter the geologic picture of the area.

Alaska↗
USGS1949

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↗
USGS1949

Suggested correlation in Simpson seeps region

During the 1949 drilling season eight core tests were completed in the Simpson Seeps area up to October 25th„ This program, which is still in progress, was undertaken to provide an explanation for the surface seeps near Caps Simpson. The shallowest of the eight holes reached 800 feet; the deepest was drilled to a depth of 1460 feet. Geophysical data on the shallow horizons indicate that the Simpson Seeps Core Tests shown on the section have been drilled in an area of nearly north-south strike. The five core tests that most nearly approximate a section normal to the strike were chosen for the accompanying cross Section. An east-west strike, accompanied by strong anomalous dips of fifteen to twenty degrees to the north is indicated by geophysical data about five miles north of the cross section.

Alaska↗