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Image from page 32 of "[Reports vol. I-XIII]" (1891) | by Internet Archive Book Images
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Image from page 32 of "[Reports vol. I-XIII]" (1891)

Identifier: cu31924005064203

Title: [Reports vol. I-XIII]

Year: 1891 (1890s)

Authors: Missouri. Geological Survey Winslow, Arthur, 1860- Nason, Frank Lewis, 1856-1928 Schweitzer, Paul, 1840- Woodward, A. E Keyes, Charles Rollin, 1864-1942 Robertson, James D Haworth, Erasmus, 1855- Marbut, Curtis Fletcher, 1863-1935 Broadhead, Garland C. (Garland Carr), 1827-1912 Gordon, Charles Henry, 1857- Todd, James Edward, 1846-1922 Wheeler, Herbert Allen, 1859- Shepard, Edward Martin, 1854- Gallaher, John A., 1842-1900

Subjects: Geology Mines and mineral resources Paleontology

Publisher: Jefferson City

Contributing Library: Cornell University Library

Digitizing Sponsor: MSN

 

 

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oal Measure strata. The nature of some of the Coal Measure strata demandshorizontality of position at the time of deposition and as, accord-ing to the above representation, the strata are parallel with each^horizontaL Other, they must, on this interpretation, all have been depositedas horizontal layers and subsequently tilted simultaneously intothe present position. Further, the existence of coal beds nearthe base of this formation shows that even the lowermost stratawere accumulated near the surface, and, hence, to produce theconditions generally pictured, would require a regional subsi- 1 Report Mo. Geo], Survey, 1872, Parti, p. 6, THE COAL MEASURES. 27 dence of about 2,000 feet, equal in rate and amount over the whole area, with which the process of deposition kept paceSub^s^id^ence^^of equally and exactly over every portion. An ideal restoration to a horizontal position of these strata is represented in figure 3, and it is there apparent, at a glance, that, proceeding on this for.

 

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c:P= ^^^^^^^^^^ ^rrr^TT-^ ^F=V-T I r r -i-T-T-ffr Fig. 3. Same as Fig. 2, wilh strata in a horizontal position, supposition, the portions, of at least the upper parts of the CoalMeasure formations, represented could be only small remnantsof the whole, and that, with the indicated thicknesses, theymust once have spread over the higher Ozark region, as well asover the area of lower rocks in northern Iowa. We cannotbelieve such extension possible without, at least, some remnant ^tife^coai^Meas-of these rocks being left over the territory where they are nownever found ; such hypothesis is opposed to the views which havebeen advanced conceining the age and history of the OzarkUplift; it is contrary to the authoritative and generally acceptedopinions concerning the oiiginal limits of the Coal Measuresboth in Missouri and Iowa. Such representation of the relationand positions of the Coal Measure strata leading to conclusionscontrary to accepted views, it behooves us to attempt a presen-tatio

 

 

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