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abundant ammonium chloride analcite andesite anticline basalt Cambrian Carboniferous fossils Cayuga Lake cent conglomerate containing deposits described Devonian dikes eastern Egan Range Eighteenmile Creek Encrinal beds erosion Eureka quartzite exposed farther south fault fauna faunule feet thick fold formation Fortieth Parallel fossils found in Zone Furnace Creek Geological Girty granite Hall Highland Range Hot Creek IGNEOUS ROCKS lava leucite Lower Hamilton massive Meadow Valley Canyon miles north miles south mineral Nevada north-south northern end occur overlain overlying Paleozoic Peak Pleistocene Pliocene Pogonip portion probably quartz quartzite Quinn Canyon region residue rhyolite ridge sandstone scarp Schell Creek Range schists SEDIMENTARY ROCKS sediments shales siliceous Silurian Snake Range southern species specimens Spirifer strata stratified rocks structure Survey syncline Tertiary tion topography tuffs U. S. Geol Upper Carboniferous Upper Hamilton Valley Range volcanic rocks Walcott western White Pine writer
Seite 115 - LIBRARY CATALOGUE SLIPS. [Take this leaf out and paste the separated titles upon three of your catalogue cards. The first and second titles need no addition: over the third write that subject under which you would place the book in your library.] United States.
Seite 121 - The classes numbered 2, 7, and 8 are sold at cost of publication; the others are distributed free. A circular giving complete lists may be had on application. The Professional Papers, Bulletins, and Water-Supply Papers treat of a variety of subjects, and the total number issued is large. They have therefore been classified into the following series: A, Economic geology; B, Descriptive geology; C, Systematic geology and paleontology; D, Petrography and mineralogy; E, Chemistry and physics; F, Geography;...
Seite 231 - Geology and water resources of the Patrick and Goshen Hole quadrangles in eastern Wyoming and western Nebraska, by GI Adams. 1902. 50 pp., 11 pis. B 199. Geology and water resources of the Snake River Plains of Idaho, by IC Russell.
Seite 122 - Price 20 cents. 66. On a Group of Volcanic Rocks from the Tewan Mountains, New Mexico, and on the occurrence of Primary Quartz in certain Basalts, by Joseph Paxson Iddings.
Seite 14 - Stromatopora beds (Manlius limestone"), (4) Oriskany sandstone (this formation has a maximum thickness here of 4 feet 10 inches and thins out to nothing in less than a mile, leaving the Onondaga (Corniferous) in contact with the Lower Helderberg), (5) Onondaga limestone, (6) Marcellus shales, (7) Hamilton shales and impure limestones, (8) Tully limestone, (9) Genesee shale, (10) Portage shales and sandstones. (See fig. 1.) For the purpose of this paper it will not be necessary to speak more fully...
Seite 11 - Ouondaga (Coruiferous) limestone, an attempt was made to collect the complete faunule from each zone throughout the entire Hamilton formation up to the Tully limestone. In the identification of the fossils the principle has been followed that unless absolutely necessary no new species or varieties should be described, but that all doubtful specimens should be referred to species already figured. The writer is indebted to Prof. HS Williams for many helpful suggestions concerning methods of work. 11...
Seite 91 - ... all or takes place very seldom, and that it makes little difference how much time elapses so long as the conditions of environment remain unchanged. (7) An analysis of the Hamilton faunas shows conclusively that there is little basis for the terms "an upper...
Seite 36 - PECTOLITE. The pectolite which was chosen for examination was the well-known radiated variety from Bergen Hill, NJ The mineral was in long white needles, and apparently quite pure, but the analysis shows that it contained some carbonate as an impurity. Enough of the material was ground up to furnish a uniform sample for the entire series of experiments, and the work properly began with a complete analysis. The results obtained are as follows: SiO, 53.34 A1,O,---- 33 CaO 33.23 MnO'_ 45 Na,O 9.11 HaO...
Seite 19 - Chapellc, etc., is represented in the New York sections by the Tully limestone, and. second, that the representative of the fauna of the Cuboides zone of Europe is seen in New York not only in the Tully limestone, but in the shaly strata for several hundred feet above. Therefore, if we wish to express precise correlation in our classification of American rocks, the line between Middle and Upper Devonian formations should be drawn at the base of the Tully limestone...
Seite 122 - Some distance farther up, apparently belonging to the same series as the breccia, was found an ancient, apparently water-laid tuff, which microscopic examination shows to be rhyolitic, with above it a bed of coarse volcanic grit, and still higher a bed of volcanic conglomerate with large well-rounded pebbles of biotite-rhyolite and a matrix derived from the same rock. A short distance farther the rocks from which these detritals are derived were found in place in a hill to the north of the valley...