Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900-Twenty-First Annual Report of the United States Geological Society (1901) (14598072667)

Identifier: annualreportsofd003unit (find matches)
Title: Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900--Twenty-First Annual Report of the United States Geological Society
Year: 1901 (1900s)
Authors: United States Department of the Interior
Subjects:
Publisher:
Contributing Library: Clemson University Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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TWENTY-FIRST ANNUAL REPORT PART III PL. LX
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gkni<:hai. map ARKANSAS I5AUXITK DISTINCT (;()lo£>ic;Al bound.nics (•lit(>ny fixjiii ie))()rt.s ol theArkjinsii.s (W^ol^.^ictiJ Supvcy TEKTIAHY HF.OKNT SEIMMKNTS SEIMMKNTARVniXK Contourinii>i-\-iil5()f(HlLEGENDPALEOZOIC RArXITK KINKOITS ROCK.- UncotisolidiUod gnivrlSiuxliuuldav THE ARKANSAS BAUXITE DEPOSITS. Bv Chaklks AVillard Hayes. DISTRIBFTIOX OF BAUXITE DEPOSITS IX THE TJISTTEDSTATES. Although aluminum is one of the commonest of the elements whichenter into the comj^osition of the earths crust, it usually occurs incombination with silica as silicate, and the oxide is comparatively rare.Like iron, the metal forms a number of oxides varying widelv in theirphysical properties, which depend chiefly on the amount of water con-tained in combination. Thus corundum, the anhydrous oxide AljOj,is found in small quantities associated usually with crystalline rocks.Diaspore, Al^Oj H.,0, and gibbsite, Al^Og .SH,0, the first containingless and the second more water than