Forest physiography; physiography of the United States and principles of soils in relation to forestry . Water Resources of Northern Louisiana andSouthern Arkansas, Prof. Paper U. S. Geol. Surv. No. 46, 1906. 2 John C. Branner, Science, n. s., vol. 21, 1905, pp. 514-515; E. W. Hillgard, idem, ; W. J. Spillman, idem, p. 632; A. H. Purdue, idem, pp. 823-824; and C. V. Piper, idem,pp. 824-S25. Branner and Purdue suggest that these mounds may represent immense con-cretionary formations. Spillman refers certain mounds in southwest Missouri to unequalweathering of limestone containing larg
Forest physiography; physiography of the United States and principles of soils in relation to forestry . Water Resources of Northern Louisiana andSouthern Arkansas, Prof. Paper U. S. Geol. Surv. No. 46, 1906. 2 John C. Branner, Science, n. s., vol. 21, 1905, pp. 514-515; E. W. Hillgard, idem, ; W. J. Spillman, idem, p. 632; A. H. Purdue, idem, pp. 823-824; and C. V. Piper, idem,pp. 824-S25. Branner and Purdue suggest that these mounds may represent immense con-cretionary formations. Spillman refers certain mounds in southwest Missouri to unequalweathering of limestone containing large chert masses. Branner gives many references to themounds of the Pacific coast, for which he states the following theories have been advanced:(i) surface erosion, (2) glacial origin, (3) aeolian origin, (4) human origin, (5) burrowinganimals, including ants, and (6) fish nests exposed by elevation. D. I. Bushnell, Jr., Science,n. s., vol. 22, 190S, pp. 712-714, has suggested the human origin theory, and this phase of thematter has been discussed by Veatch, Science, n. s., vol. 23, igo6, pp. g. 214. — One of the timber jams composing the great Red River raft In buch a jam silt accumulatesvery rapidly and effectually fills the channel. (Veatch, U. S. Geo!. Surv.)
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
