WHERE ARE LIMESTONE AND DOLOMITE QUARRIES LOCATED IN ILLINOIS?
Limestone and dolomite quarries are located along the southern, western, and northern margins of the state where the thick deposits of these rocks crop out at the surface. Although bedrock was deposited in horizontal layers, it has since been downfolded into the Illinois Basin whose center is in southeastern Illinois. Thus, the thick limestones and dolomites that are quarried along the margins of the state are too deeply buried to be quarried in the central part of this basin ([fig. 15]).
Figure 14—Fossils commonly found in Illinois rocks.
Strophomena 1× Paleoneilo 1× Ctenodonta ⅔× Dolmanites ½× Archimedes 1× Hormotoma Polygyra 1× Mucrospirifer 1½× Atrypa ⅔× Crinoid Columnais 1× Halysites ⅔× Hexagonaria 1× Microcylus 1× Streptelasma ⅔× Lithostrationella ½× Lophophyllum 1×
Figure 15—Diagrammatic cross section of the Illinois Basin.
MISS. RIVER Waterloo Mt. Vernon ILLINOIS WABASH RIVER INDIANA New Albany OHIO RIVER