Annual Report of the United States Geological Survey to the Secretary of the Interior

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U.S. Government Printing Office, 1902
 

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Seite 736 - ... and Fort Smith. There are two general classes of clays at Little Rock available for cement manufacture: (1) The Tertiary clays that occur in horizontal beds in the southern and southwestern part of the city; and (2) the Carboniferous clay shales exposed in the railway cuts along the south bank of Arkansas River, in the cuts west of the town, and in others west of Argenta. There are other clays about Little Rock and Argenta, such as the chocolate-colored clays along the margins of the river bottoms,...
Seite 723 - Creek, as shown in analysis 2t>, page 111. The basal member of the chalk-marl, containing the same indurated shell bed, outcrops here at about 10 feet above the creek bottom, and below it is the blue marl. Yellow sandy clays overlie the chalky marl here, as in the exposures noted on Big Deciper Creek. At the east side of the creek bottom, on the Arkadelphia-Okolona road, and northward through the Raskins place, the lower part of the chalk-marl is exposed in gullies in an abandoned field.
Seite 704 - ... 60 2. Massive dull bluish-white siliceous chalk. Slightly harder than the pure chalk of 1, practically without indication of bedding, and because of its hardness projects in a steep bench overhanging the less chalky beds below. Analysis No. 6 shows that this chalk contains nearly twice as much silica as the chalk above. This bed occurs in the bench beneath the quarry and passes to the level of the river bottom near the clay pit south of the works. An outcrop occurs also near the middle of the...
Seite 704 - Massive, creamy white chalk, in beds from a foot to about 10 foet thick, separated by thin partings of very slightly laminated chalk. The variation in the character of the chalk from bed to bed is not perceptible on physical examination, and the stratification planes are not clearly defined except upon partial weathering of the rock. Analysis No. 7 (p. Ill...
Seite 720 - About 20 feet of the middle portion of the formation is exposed in the Okolona-Garden road, 1 mile east of Okolona. In the high rolling country east of Okolona the Saratoga chalkmarl is generally concealed beneath its own soil or beneath sand of Neocene age. The lower beds of the chalk outcrop in the Okolona-Dobyville road, 2 miles west of Dobyville, and at several other places in the top of the escarpment between Okolona and Dobyville. One-fourth of a mile north of Joseph Doby's house, at Dobyville....
Seite 666 - BO far as can be judged this material is worth careful investigation on the part of cement makers. The Antrim shales are exposed on the shore of Thunder Bay, and also at several localities in Charlevoix County, where they are associated with marl deposits. The availability of these shales in manufacturing Portland cement and the utilization of the organic matter they contain as a by-product seems to be a possibility worthy of consideration.
Seite 664 - TheColdwater shales are now being quarried at a locality about 1J miles east of Union City and utilized by the Peerless Portland Cement Company. At the quarry referred to the shales are well exposed to a depth of from 20 to 35 feet, are thin bedded, horizontal, and contain irregular concretions of ferrous carbonate, some of which are charged with fossil marine shells. The rocks near the surface are much weathered and so completely disintegrated that the evenly bedded bluish shales t>elow pass upward...
Seite 737 - ... for making bricks on the north side of the river; but these latter two kinds of clays are not available for cement manufacture, partly because they are too sandy, but also because they are not homogeneous. An analysis of the pink clay of Argenta shows it to contain more than 83 per cent of silica. The Carboniferous clay shales are well exposed in the railway cut near the upper bridge, and where the electric power house stands. Similar shales may be found here and there over a large part of Pulaski...
Seite 434 - ... at No. 6, but less than this to the southward. Along the eastern border the Laramie outcrop is overlapped by what is probably the post-Laramie formation, which is found resting on the border of the granite hills bounding the district to the eastward,. The seam worked at No. 5 contains from 5 to 7 feet of coal in the lower bench and 2 feet in the upper bench, which is separated from the lower by from 8 inches to 3 feet of shale. At No. 6, which is about a mile south of No. 5, the seam worked is...
Seite 704 - W., and covers an area of about ti.OO acres. A large part of the chalk of the Whitecliffs area is covered by a thin mantle of gravel and sand. In places this gravel may attain a thickness of several feet, but it is believed that it will nowhere interfere seriously with the removal of the chalk. The chalk is also concealed in places, especially near the border of the the area, by its own residual soil, with scattered pebbles or a ven* thin layer of gravel.

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