Hydrogeology of the Silurian dolomite aquifer in parts of northwestern Illinois

T. H. Larson, A. M. Graese, P. G. Orozco

Research output: Contribution to journalArticle


The Blanding aquifer in the north is less than 100 feet thick and less productive than the Racine aquifer, which is up to 300 feet thick in the south and central parts of the area. The Silurian dolomite aquifer is used primarily for domestic supply; reports of yields great than 100 gallons per minute (gpm) are rare. The dolomite aquifers are moderately to highly susceptible to contamination because of abundant vertical fractures exposed at or near the surface. The southwestern part of the region is an exception; there the overlying fine grained material is greater than 50 ft thick, resulting in lower susceptibility to contamination. -from Author

Original languageEnglish (US)
JournalEnvironmental Geology - Illinois State Geological Survey
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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