. The elements of geology, for popular use : containing a description of the geological formations and mineral resources of the United States. Geology; Geology. HOW TO OBSERVE. 63 horizontal position, conformably upon each other, and a force should be exerted from beneath, in a direction perpendicular to their strata, sufficiently strong to eject the central mass T, is it not plain thar, as they are elevated, the broken edges of the several strata will be piled up against the ejected mass 1 To illustrate this still farther : Suppose, for example, we lay a double series of books on each other i
. The elements of geology, for popular use : containing a description of the geological formations and mineral resources of the United States. Geology; Geology. HOW TO OBSERVE. 63 horizontal position, conformably upon each other, and a force should be exerted from beneath, in a direction perpendicular to their strata, sufficiently strong to eject the central mass T, is it not plain thar, as they are elevated, the broken edges of the several strata will be piled up against the ejected mass 1 To illustrate this still farther : Suppose, for example, we lay a double series of books on each other in a horizontal position, thus, and then elevate Fig. Fig, 17. them by a force placed be- neath the line of junction, the edges, of course, would be raised up, and book would be piled against book, like the gable end of a roof, thus (fig- ^ure 17): We sometimes find rocks elevated in this manner, without discovering any evidence of the cause that produced the change of position. The internal force may not have been sufficiently powerful to raise a mass of rocks to the surface, and yet suffi- cient to fissure the crust and tilt the rocks into a very elevated position, as in Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lee, Charles A. (Charles Alfred), 1801-1872. New-York : Harper & Brothers
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1846
