Mapping karst regions of Illinois: Preliminary results
Conference
·
· Geological Society of America, Abstracts with Programs; (United States)
OSTI ID:7271687
- Illinois State Geological Survey, Champaign, IL (United States)
Groundwater contamination may be significant in shallow aquifers in the parts of Illinois where karst occurs. Problems with ground-water contamination in shallow aquifers in karst areas may be significant in parts of Illinois. A study is underway to study factors that contribute to karst development and to map the karst areas of the state, including areas where obvious diagnostic karst geomorphic features are absent. The following generalizations can be made about the structural and stratigraphic factors that control the extent and maturity of karst areas and the development of karstic terrain in Illinois: (1) karstification is restricted to the flanks of the Illinois Basin because most of the basin interior contains carbonate-poor Pennsylvanian bedrock; (2) karstic terrain generally occurs in thick, flatlying, carbonate-rich lithologic units; (3) carbonate to non-carbonate facies changes in formations and the presence of disconformities affect the degree of karstification; (4) structures (folds, faults) may either increase or decrease the likelihood of karstification; and (5) karstification is potentially greater in areas where overlying regolith is absent or thin.
- OSTI ID:
- 7271687
- Report Number(s):
- CONF-9303210--
- Conference Information:
- Journal Name: Geological Society of America, Abstracts with Programs; (United States) Journal Volume: 25:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
58 GEOSCIENCES
580000* -- Geosciences
AQUIFERS
CARBONATE ROCKS
CAVES
CAVITIES
DEVELOPED COUNTRIES
GEOLOGY
GEOMORPHOLOGY
GROUND WATER
HYDROGEN COMPOUNDS
ILLINOIS
MAPPING
NORTH AMERICA
OXYGEN COMPOUNDS
ROCK CAVERNS
ROCKS
SEDIMENTARY ROCKS
USA
WATER
540250 -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
58 GEOSCIENCES
580000* -- Geosciences
AQUIFERS
CARBONATE ROCKS
CAVES
CAVITIES
DEVELOPED COUNTRIES
GEOLOGY
GEOMORPHOLOGY
GROUND WATER
HYDROGEN COMPOUNDS
ILLINOIS
MAPPING
NORTH AMERICA
OXYGEN COMPOUNDS
ROCK CAVERNS
ROCKS
SEDIMENTARY ROCKS
USA
WATER