This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ... was sunk on the hilltop 500 feet above and east of the tunnel's mouth. It is said that this shaft was in gravel for its entire depth, or 375 feet. As indicated above, however, all of the gravel below the 5,000-foot contour is believed to be out of place. This downthrown material is, however, not all gravel. There is ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ... was sunk on the hilltop 500 feet above and east of the tunnel's mouth. It is said that this shaft was in gravel for its entire depth, or 375 feet. As indicated above, however, all of the gravel below the 5,000-foot contour is believed to be out of place. This downthrown material is, however, not all gravel. There is some andesitic breccia mixed with it. Numerous rhyolite bowlders and pebbles indicate an area of that rock in the vicinity, now eroded or covered over. The presence of these rhyolite pebbles would seem to indicate that a portion of this gravel is of later age than that of the Haskell Peak channel, which is capped with rhyolite. So far as could be made out, the Cedar Creek river gravel is in immediate contact on the south with the Pleistocene Mohawk Lake beds. The deposits of the old river channel just described, extending from north of the fortieth parallel near Little Grizzly Creek to the north end of the Mohawk Lake beds, are similar in being made up of gravel and coarse sand, with very little fine sediment. This may be taken as evidence that this river bed had a higher grade than those of the southwesterly system of the western half of the Downieville area. The next gravel area to the east of the high Sierra Buttes is on the steep granite slope south of Mohawk Valley, where it has an elevation of 7,000 or more feet. A large portion of this gravel mass has, however, gravitated down the slope, and some of it lies at an elevation of only 6,600 feet. Overlying the gravel is rhyolite. This channel is next exposed on the rhyolite-capped spur miles north of Haskell Peak, where there is a layer of fine loose sediment overlying the gravel. Among the pebbles in this deposit are many which appear to have been derived from the old tuffs of the Milton fo...
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Add this copy of The Tertiary Gravels of the Sierra Nevada of California to cart. $19.72, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of The Tertiary Gravels of the Sierra Nevada of California to cart. $29.16, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Tertiary Gravels of the Sierra Nevada of California to cart. $45.00, very good condition, Sold by Paradise Found Books rated 4.0 out of 5 stars, ships from Chico, CA, UNITED STATES, published 1981 by del oeste PRESS.
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Add this copy of Tertiary Gravels of the Sierra Nevada of California to cart. $88.34, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 1978 by Robert Ames.