Identifier: popularsciencemo81newy (find matches)
Title: The Popular science monthly
Year: 1912 (1910s)
Authors:
Subjects: Science Technology
Publisher: (New York, Popular Science Pub. Co., etc.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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Fig. 7. Face of the High Acoma Mesa. The Acoma Pueblo is shown on the summit.
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o - isaZ d a H W 73 o « H CO ao HCO Q2 o CO a H az a 73 yo « s o o aaaozaQ 03 a WIND-GRAVED MESAS 237 By wind-action alone there appears now to be incontestable testi-mony that from the entire area of the vast arid region there has beenlifted and exported by the winds in very recent geologic times a prodi-gious layer of rock not less than 5,000 feet in thickness. With a con-tinuance of the present climatic conditions another volume of rock-materials of equal dimensions seems allotted to be similarly transportedbefore the effects of the process shall become appreciably diminished. Thus it is that the arid regions have introduced to us an erosiveagent more potent than stream-corrasion, more constant than the wash-ings of the rains, more extensive and persistent than the encroachmentsof the sea. The present conception of general eolic erosion, a sculptur-ing power in every way comparable to erosion by river and by ocean,appears destined to take its place among the first half-dozen grea

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