Environmental geology of Allen County, Indiana

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Authors:Bleuer, N. K.; Moore, M. C.
Source:Special Report - Indiana Geological Survey, 13, 72p. Publisher: Indiana Geological Survey, Bloomington, IN, United States. ISSN: 0537-2933
Publication Date:1978
Note:In English. Environmental study 13. 34 refs.
Summary:This report is designed to provide geologic data for planning the use of mineral resources (including ground water), the disposal of domestic and industrial wastes, and foundation engineering for structures in Allen County. The surficial morphology of the county, its linear moraine ridges, glacial and postglacial drainage routes, and lake plain, reflects various modes of glacial and glacial lake or stream deposition. The near-surface unconsolidated materials, clayey glacial till, stream-deposited sands and gravels, and lake clay, reflect these origins as well. But beneath these surface materials lies buried a stack of similar deposits, including hard loamy tills, of earlier glacial episodes. The surface of the buried hard till mirrors the present surface topography, much of which may be inherited from that earlier glaciation. Drift ranges from less than 40 feet to more than 300 feet in thickness, and it covers an erosional surface developed on Devonian and Silurian limestone and dolomite and on Mississippian black shale. The predominantly limestone and dolomite bedrock in Allen County was deposited in an ancient sea basin centered in Michigan. The rock is tilted slightly northward. The basin margin environment proved conducive to reef growth at times, especially during the Silurian Period.
Subjects:Areal geology; Construction materials; Economic geology; Engineering geology; Environmental geology; Geomorphology; Glacial geology; Ground water; Hydrogeology; Land use; Mineral resources; Petroleum; Sediments; Surveys; Waste disposal; Water resources; Allen County Indiana; Indiana; United States
Coordinates:N405500 N411500 W0844500 W0852000
Record ID:1979004025
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute.
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001 1979004025
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005 20200123144114.0
008 180305s1978 inua 0 0 eng d
030 |a IGSSB5 
034 0 |a a  |d W0852000  |e W0844500  |f N411500  |g N405500 
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 22  |2 georeft 
100 1 |a Bleuer, N. K.  |e monographic author 
245 1 0 |a Environmental geology of Allen County, Indiana 
260 |a Bloomington, IN :   |b Indiana Geological Survey,   |c 1978 
300 |a 72 p.  |b illus. incl. plates, sects., tables, strat. cols., geol. sketch map 
440 0 |a Special Report - Indiana Geological Survey  |x 0537-2933, no. 13 
500 |a In English. Environmental study 13. 34 refs. 
500 |a Key title: Special Report - Indiana Geological Survey 
500 |a Source note: Special Report - Indiana Geological Survey, 13, 72p. Publisher: Indiana Geological Survey, Bloomington, IN, United States. ISSN: 0537-2933 
500 |a Publication type: monograph 
504 |b 34 refs. 
506 0 |a Open access 
510 3 |a GeoRef, Copyright 2020 American Geosciences Institute. 
520 |a This report is designed to provide geologic data for planning the use of mineral resources (including ground water), the disposal of domestic and industrial wastes, and foundation engineering for structures in Allen County. The surficial morphology of the county, its linear moraine ridges, glacial and postglacial drainage routes, and lake plain, reflects various modes of glacial and glacial lake or stream deposition. The near-surface unconsolidated materials, clayey glacial till, stream-deposited sands and gravels, and lake clay, reflect these origins as well. But beneath these surface materials lies buried a stack of similar deposits, including hard loamy tills, of earlier glacial episodes. The surface of the buried hard till mirrors the present surface topography, much of which may be inherited from that earlier glaciation. Drift ranges from less than 40 feet to more than 300 feet in thickness, and it covers an erosional surface developed on Devonian and Silurian limestone and dolomite and on Mississippian black shale. The predominantly limestone and dolomite bedrock in Allen County was deposited in an ancient sea basin centered in Michigan. The rock is tilted slightly northward. The basin margin environment proved conducive to reef growth at times, especially during the Silurian Period. 
650 7 |a Areal geology  |2 georeft 
650 7 |a Construction materials  |2 georeft 
650 7 |a Economic geology  |2 georeft 
650 7 |a Engineering geology  |2 georeft 
650 7 |a Environmental geology  |2 georeft 
650 7 |a Geomorphology  |2 georeft 
650 7 |a Glacial geology  |2 georeft 
650 7 |a Ground water  |2 georeft 
650 7 |a Hydrogeology  |2 georeft 
650 7 |a Land use  |2 georeft 
650 7 |a Mineral resources  |2 georeft 
650 7 |a Petroleum  |2 georeft 
650 7 |a Sediments  |2 georeft 
650 7 |a Surveys  |2 georeft 
650 7 |a Waste disposal  |2 georeft 
650 7 |a Water resources  |2 georeft 
651 7 |a Allen County Indiana  |2 georeft 
651 7 |a Indiana  |2 georeft 
651 7 |a United States  |2 georeft 
700 1 |a Moore, M. C.,  |e monographic author