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abundant acid action aggregate already alteration angle appear associated Baltimore bands beds brown character chemical chlorite cleavage closely collected color compact completely composed composition considerable constituents contain crystalline crystals described developed diabase diallage dikes diorite direction epidote eruptive especially evidence examination fact Falls feldspar fragments frequently gabbro Geol Geological grains granite green greenstone hornblende hypersthene inclusions indicate interesting iron known Lake less light localities Marquette mass massive material Menominee mentioned metamorphism Michigan microscope mineral Mountain nature nearly observed occur olivine original parallel planes plates porphyritic portion present probably produced Professor pyroxene quartz recently regarded region represented resemblance River rocks schistose schists secondary seems seen sericite serpentine shown shows side similar sometimes specimens structure substance surface Survey tion trace twinning typical variety volcanic
Page 9 - The publications of the United States Geological Survey are issued in accordance with the statute approved March 3, 1879, which declares that— "Thepublicationsof the Geological Survey shall consist of the annual report of operations, geological and economic maps illustrating the resources and classification of the lands, and reports upon general and economic geology and paleontology.
Page 9 - Director, but otherwise in ordinary octavos. Three thousand copies of each shall be published for scientific exchanges and for sale at the price of publication; and all literary and cartographic materials received in exchange shall be the property of the United States...
Page 11 - Price 5 cents. 20. Contributions to the Mineralogy of the Rocky Mountains, by Whitman Cross and WF Hillebrand. 1885. 8°. 114pp. 1 pi. Price' 10 cents. 21. The Lignites of the Great Sioux Reservation.
Page 41 - III. Geology of the Comstock Lode and the Washoe District, with Atlas, by George F. Becker. 1882. 4°.
Page 41 - Price 5 cents. 3. On the Fossil Faunas of the Upper Devonian, along the Meridian of 76° 30', from Tompkins County, New York, to Bradford County, Pennsylvania, by HenryS.
Page 10 - Newberry. 1888. 4°. xiv, 152 pp. 26 pi. Price $1.00. XV. The Potomac or Younger Mesozoic Flora, by William Morris Fontaine. 1889. 4°. xiv, 377 pp. 180 pi. Text and plates bound separately. Price $2.50. XVI. The Paleozoic Fishes of North America, by John Strong Newberry. 1889. 4°. 340 pp. 53 pi. Price $1.00. XVII. The Flora of the Dakota Group, a Posthumous Work, by Leo Lesquereux. Edited by FH Knowlton. 1891. 4°.
Page 41 - On July 7, 1882, the following joint resolution, referring to all Government publications, was passed by Congress : ' ' That whenever any document or report shall be ordered printed by Congress, there shall be printed, in addition to the number in each case stated, the ' usual number ' (1,900) of copies for binding and distribution among those entitled to receive them.
Page 6 - Price 10 cents. 65. Stratigraphy of the Bituminous Coal Field of Pennsylvania, Ohio, and West Virginia, by Israel C. White. 1891. 8°. 212pp. 11 pi. 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.
Page 10 - Price 10 cents. 2. Gold and Silver Conversion Tables, giving the coining values of troy ounces of fine metal, etc., computed by Albert Williams, jr. 1883. 8°. 8 pp. Price 5 cents. 3. On the Fossil Faunas of the Upper Devonian, along the meridian of 76° 30', from Tompkins County, NY, to Bradford County, Pa., by Henry S.