Identifier: walkstalksingeol1898winc (find matches)
Title: Walks and talks in the geological field
Year: 1898 (1890s)
Authors: Winchell, Alexander, 1824-1891 author Starr, Frederick, 1858-1933 editor
Subjects: Geology
Publisher: Meadville, Penna. : Flood and Vincent
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University

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ription of aconglomeritic sandstone. The face of the cliflT shows congiom-several yawning fissures extending from bottom to ®^^tes.top. The winter snow drifts into these in suchabundance as to remain, sometimes, till midsummer.One of these chasms is known, therefore as the IceHouse.You observe that this precipice is com-posed of layers of sandstone piled one above theother. These are strata^ and the whole formation isstratified, (Notice that one of these layers is astratum—not *a strata^; and we must never say stratas.) You observe, also, that some of the strata are composed of lamince which run obliquely across the stratum. This is oblique lamination. It oblique is of the same nature as we saw in the semi-stratified lami-nation. Drift. We concluded that such mode of arrange-ment was caused by torrential action. A similar ex-planation is allowable here, but the water was lessturbulent; it was, perhaps, wave action along a beach.1 Panama, N. Y., nine miles south of Chautauqua. F. S.
Text Appearing After Image:
THE MU-KUN-TU-WEAP ON THE VIRGIN RIVER, COLORADO.Showing architectural forms resulting from erosion. By the Rocky WalL 73 Watkins^ Glen, at the south end of Seneca Lake, is shaiea wild, deep gorge cut by a stream which rushesdown from the highland on its way to the lake. Itis a striking example of erosion, and the materialscarried away are deposited in Seneca Lake. Therocks here are shales. They are thin-beddedj and softenough to be cut with a knife. We see no obliquelamination. This is a fine example of another sortof strata. At Rochester, where the Central Railroad Lime-crosses the Genesee River, a few rods above the Falls,we look down into a gorge eroded by the river. Thehigh walls of the gorge are distinctly stratified ; andhere many of the strata are composed of limestone.No traces of oblique lamination can be found in lime-stones. If we go to Portland, in Connecticut, wemay look down into wide and deep excavations in asandstone rock of a brownish color, and very evenly sand-bedd

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