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USGS1950

Preliminary report on the stratigraphy and structure of the upper Siksikpuk - Nanushuk Rivers area

Structural and stratigraphic studies of the rocks in the Siksikpuk and Nanushuk Rivers area were conducted by Navy Oil Unit party No. 2 during the summer field season of 1950. The field party consisted of six men: 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 Nanushuk, Anaktuvuk, Siksikpuk; and Chandler Rivers. The mapped area adjoins the Okpikruak and Kiruktagiak Rivers area1/ 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 cutbanke 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 during the 1949 field season.

Alaska↗
USGS1950

Preliminary report on selected sections of Lisburne Limestone, Brooks Range, Alaska

Location: - This report describes sections of the Lisburne limestone studied in the foothills and northern mountains of the Brooks Range, Alaska. The area covered extends along the front of the range from Sagavanirktok Lake (68°28' N. - 149°25' W.) west to the head of the Kukpowruk River (68°25' N. - 162°40' W.). The southernmost point in the area is at the head of Alapah Creek (68°11' N. - 150°40' W.) and the northernmost point is on Lisburne Ridge just west of the Etivluk River (68°36' N. - 156°40' W.). Field work was done by the authors at Sagavanirktok Lake, Kanayut Lake, Alapah Creek, the Anaktuvuk and Tiglukpuk Creek, and Chandler Lake. Brief visits were made to the Lisburne Ridge just north and west of the junction of the Nigu and Etivluk Rivers and to outcrops of Lisburne limestone along the Kiligwa River (68°30' N. - 158°35' W.). Data from other areas included in this report were collected by other field parties of the U. S. Geological Survey. A. L. Bowsher, Sr. .and J. T. Dutro, Jr. studied the Lisburne limestone at Kanayut Lake, Nanushuk Lake, and Itkillik Lake in 1949 1 / .W. W. Patton, Jr. and Irving L. Tailleur described the Lisburne limestone exposed in the northern Brooks Range along the Kiruktagiak River 2 / and the Okokmilage River 3 / in1949, and I. L. Tailleur and Bion H. Kent have supplied data on the Etivluk-Kiligwa Rivers area from their field work of 1950 4 /. R. M. Chapman, G. D. Eberlein, and C. D. Reynolds measured sections of Lisburne limestone at Kurupa Lake and on the east fork of the Etivluk River in 1950 5 /. E. G. Sable and M. D. Mangus measured the section on Iligluruk Creek near the head of the Kokolik River in 1950 6 /,, and Chapman end Sable measured the section at the head of the Kukpowrok River in 1949 7 /.

Alaska↗
USGS1950

Preliminary report on the stratigraphy and structure of part of the Carbon Creek and Ketik anticlines

U. S. Geological Survey Party No. 4 mapped the stratigraphy and structure of parts of the Carbon Creek and Ketik anticlines during the summer of 1950. The area, which lies in quadrangles I-19 and I-20 is shown in figure 1. Large-scale maps, compiled from plane-table surveys, give a more detailed picture of two parts of the area, the west plunge of the Carbon Creek anticline (fig. 2) and a segment near the middle of the Ketik anticline (fig. 3).

Alaska↗