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6 Titles Match Your Query
Showing 1 through 6 of 6
1. Coarse-grained Materials Within 50 Feet of the Ground Surface in Illinois [IGDNR_ALLST_AQ50]
This map shows the distribution of coarse-grained materials and permeable bedrock within 50 feet of ground surface in Illinois. This includes bedrock, sand and gravel, and alluvial units ...


2. Major Bedrock Aquifers Within 300 Feet of Ground Surface [IGDNR_ALLST_AQMB300]
This map shows the distribution of major bedrock aquifer units within 300 feet of ground surface containing potable water in Illinois. Major aquifers are capable of yielding 70 gallons ...


3. Major Bedrock Aquifers Within 500 Feet of Ground Surface [IGDNR_ALLST_AQMB500]
This map shows the distribution of major bedrock aquifer units within 500 feet of ground surface containing potable water in Illinois. Major aquifers are capable of yielding 70 gallons ...


4. Major Bedrock Aquifers at Depths Greater Than 500 Feet Below Ground Surface [IGDNR_AQMBG500]
This map shows the distribution of major bedrock aquifer units at depths greater than 500 feet below ground surface in Illinois. Major aquifers are capable of yielding 70 gallons of water ...


5. Major Sand and Gravel Aquifers in Illinois [IGDNR_AQMSG]
This map shows the distribution of major sand and gravel aquifers at any depth in Illinois. Generally, the tops of such aquifers lie within 300 feet of the surface and the bases occur ...


6. Stack-Unit Mapping of Geologic Materials in Illinois to a Depth of 15 Meters [IGDNR_STACK_ST]
This is an Arc/Info polygon data set containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mapping of Geologic Materials in Illinois ...


Showing 1 through 6 of 6
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