Bulletin, Issue 670

Front Cover
U.S. Government Printing Office, 1918 - Geology
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 38 - The rise of the creek from a rainfall one night washed it awny, but it immediately commenced again to accumulate, and in less than a week the original quantity was stored. At the present time oil does not collect in noticeable quantity in the creek bed. A small sand bar in the middle of the creek marks the site of the spring...
Page 21 - The writer measured one which was 6 inches in diameter and 2 feet 6 inches long in its exposed portion. The entire bone was considerably longer. It was identified by CW Gilmore as the distal half of a femur of an animal belonging to the genus Trachodon. Turtle shell was associated with it, and petrified wood is common in the sandstone. A group of thin coal beds, dark shale, and white sandstone, the whole 190 feet thick, increases the height of the sandstone escarpment or forms a second escarpment...
Page 28 - Creek field the line marking the contact of the oil pool with the water that occupies the sand on the flanks of the fold below the oil varies only about 150 feet in elevation in the entire circuit of the dome and lies at the very crest.
Page 19 - NIOBRARA SHALE. About 220 feet above the top of the Wall Creek sandstone the dark shale of the Benton gives place to the buff or bluish-gray shale...
Page 22 - Xear the top of the fresh-water beds just described is a white sandstone, 10 to 40 feet thick, and above it in certain localities is a thin calcareous layer in which are embedded fragments of dinosaur bones, among which a caudal vertebra of Trac.hodon was identified. At this horizon, in the SW. | SE. \ sec. 23, T. 41 N., R. 79 W., a dermal scute of an ancient crocodile was obtained, but no other bones were found in the vicinity (p. 54...
Page 19 - Exposures in this locality are good and there seems to be little chance of error unless concealed faults have duplicated the beds. Even if this section is disregarded, however, it is evident that the Niobrara in this general region is of unusual thickness as compared with other localities, although much less distinct in lithologic character. MONTANA GROUP.
Page 5 - ... possibly be found in this region. The author points out the most favorable places to search for such deposits. The report contains topographic and geologic maps and other illustrations. BULLETIN 670. The Salt Creek oil field, Wyo., by CH Wegemann. 1918. 52 pages, 7 plates, 2 text figures. Describes the Salt Creek oil field, which produces daily 10,000 barrels of highgrade paraffin oil and is one of the largest proved fields in Wyoming. This field includes an area of about 7 square miles lying...
Page 21 - ... sandstone escarpment or forms a second escarpment outside of it. These beds apparently represent alternating brackish-water and fresh-water con.ditions. Some of the strata contain considerable iron, which gives them a brownish cast. The contrast in colors — white, black, brown, and gray — between the numerous thin beds of this group is striking. The coal beds are less than 14 inches thick in this field. They occur at the same horizon as those mined 50 miles farther south, near Casper (" coal...
Page 11 - From sec. 16 it flows northward for about 5 miles in a valley that lies between the Parkman escarpment, on the east, and the escarpment or rim rock of the Shannon sandstone, on the west, and in sec. 29, T. 40 N., R. 78 W., it turns abruptly to the west and cuts through the Shannon rim rock. Inside the rim rock of the Salt Creek dome the stream is joined, in sec. 25, T. 40 N., R. 79 W., by another stream from the south, known as Castle Creek, which drains the south half of the dome within the Shannon...
Page 8 - ... Lane into the field as manager. Drilling began in the fall of 1908 and the oil sand was struck October 21 at a depth of 1,052 feet, oil and gas in small quantities being found near its top. Drilling was continued that night, and at 11 o'clock pm the gas took fire from the light of a lantern. JE Stock was badly burned and no work was done the following day, but on October 23 drilling was continued to a depth of 24 feet into the sand. Oil rose to the top of the casing and then the well began to...

Bibliographic information