Annual Report for ... with Accompanying Papers, Volume 2Published for the Iowa Geological Survey, 1894 - Geology |
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Common terms and phrases
Appanoose Appanoose county argillaceous basin bituminous shale bluffs calcareous channel clay seams Clay shale Coal Bed coal field Coal Measure strata Coal Measures coal seams coal vein considerable county line creek Cretaceous dark deposits Devonian district drift exposures extensive farther feet deep feet in depth feet in thickness Figure Fire clay Fire clay exposed fissile formation Fort Dodge four feet geological gray half a mile impure inches in thickness Iowa coal known layers light colored Louis limestone Lower Coal Measures Mahaska county Marion county miles directly mines Missouri Moines river Nodaway river northeastern number of places opened operated outcrops outliers portion present Raccoon river railroad Redrock region rocks roof Saint Louis limestone sandstone sandy seams of coal shaft shaly short distance Skunk river slope southeast southwest strata stream surface tion Upper Coal Measures valley vein of coal vicinity water level ΙΟ
Popular passages
Page 526 - THE UNIVERSITY OF MICHIGAN GRADUATE LIBRARY DATE DUE BOOK CARD DO NOT REMOVE A Charge will be made if this card is mutilated or not returned with the book GRADUATE LIBRARY THE UNIVERSITY OF MICHIGAN ANN ARBOR, MICHIGAN GL DO NOT REMOVE OR MUTILATE CARD M 1 M UNIVERSITY OF MICHIGAN 3 9015 03196 0217 JA...
Page 99 - Coal Measures, representing the more strictly marine beds. It is the formation typically 32. Loc. cit., pp. 84, 85. developed in the northwestern part of Missouri. The Missouri river also winds its way for more than 400 miles through the beds of this stage, exposing numberless fine sections on both sides of the stream throughout the entire distance.
Page 25 - ... WE have described at considerable length the practical details connected with the art of electro-metallurgy, without pausing to inquire into the philosophy of the action of the electric currents by which the effects are produced. It will be unnecessary to enter into a long discussion of the numerous theories that have been advanced from time to time to explain the action that takes place in a battery or decomposing cell, while the current is passing through the solution — a brief reference...
Page 15 - By the power developed in its combustion all the wheels of industry are kept in motion ; commerce is carried with rapidity and certainty over all portions of the earth's surface, the useful metals are brought from the deep caves in which they have hidden themselves, and are purified and wrought to serve the purposes of man. By coal, night is in one sense converted into day, winter into summer, and the life of man, measured by its fruits, greatly prolonged. Wealth, with all the comforts, the luxuries,...
Page 49 - Limestone. — The upper member of the Osage, on the other hand, has its distribution chiefly on the eastern side of the " Father of Waters," covering a wide area in Illinois, Indiana, Kentucky and Tennessee. West of the river the most typical exposures are in southeastern Iowa and northeastern Missouri. At Boonville. in central Missouri, where these rocks have been reported, the faunas contained do not indicate the true Kookuk.
Page 326 - The former are from three or four inches to a foot and a half long, from a quarter of an inch to two or three inches in diameter, and of variable thickness.
Page 98 - ... but rather that along the great and successive planes of sedimentation different beds of the upper and lower divisions were laid down contemporaneously. " While the general divisions of the Coal Measures may be readily recognized, it does not seem advisable to draw...
Page 98 - The individual beds have usually a very limited extent, and replace one another in rapid succession, both laterally and vertically. The sandstones often form great lenticular masses, sometimes deeply channeled on the upper surface, the excavations being filled with Coal Measure clays. These and many other phenomena attest a constantly shifting shore line and shallow waters. The fossils contained are nearly all brackish water forms or
Page 78 - The broad belt running southeast and northwest, and traversed its entire length by the Des Moines river, from Fort Dodge to Keokuk, has heretofore been found to be much more productive of coal than other parts of the region. Lately, in places outside of this belt, coal has been discovered in abundance, and mines are rapidly being opened throughout this area, often where the presence of the commodity was unsuspected before.
Page 86 - These rocks in Iowa form a sinuous belt twenty-five to forty miles in width midway between the Cedar and Des Moines rivers. The zone mentioned thus extends from the southeastern corner of the state northwestward as far as the Minnesota line.' In southeastern Iowa the lower Carboniferous rocks form percipitous bluffs along the Mississippi and Des Moines rivers and their tributaries. The Mississippian series as represented in the continental interior is made up of four distinct formations. Only three...