Historical encyclopedia of Illinois . Creek. The coal measures of the countymay be illustrated by the following section, show-ing the general arrangement and comparativethickness of the strata: Strata. Feet. Brown sandy shale 10 to 15 Compact gray limestone ... 3 to 6 Bituminous shale 2 to 4 Coal seam No. 5 4 to 6 Fire clay and septaria S to 10 Sandstone and shale 60 to SO Bluish gray arenaceous limestone 2 to 6 Bituminous and argillaceous shales 4 to 8 Coal seam No. 3 2 to 3 Sandy aud argillaceous shale 12 to Gray limestone 4 to 6 Sandy and argillaceous shale to 30 Coal seam No. 2 C.
Historical encyclopedia of Illinois . Creek. The coal measures of the countymay be illustrated by the following section, show-ing the general arrangement and comparativethickness of the strata: Strata. Feet. Brown sandy shale 10 to 15 Compact gray limestone ... 3 to 6 Bituminous shale 2 to 4 Coal seam No. 5 4 to 6 Fire clay and septaria S to 10 Sandstone and shale 60 to SO Bluish gray arenaceous limestone 2 to 6 Bituminous and argillaceous shales 4 to 8 Coal seam No. 3 2 to 3 Sandy aud argillaceous shale 12 to Gray limestone 4 to 6 Sandy and argillaceous shale to 30 Coal seam No. 2 C. to 2 Sandstone and shale 30 to 40 Coal seam No. 1 Fire clay 1 to 3 Sandy shale and conglomerate sandstone. 15to25 The beds comprising the upper part of theforegoing section are found well exposed in thevicinity of Rushville, and also on a small brauehwhich beads near Pleasantview, and runs east-wardly into Sugar Creek. They enclose coalseam No. 5, one of the most persistent and valu-able in the Illinois coal fields. This seam ranges. ELIZABETH AVERY HISTOEY OF SCHUYLER COUNTY. 629 in thickness from four to six feet. The roof isgenerally a bituminous shale, which often eon-tains large nodules of dark blue or black lime-stone filled with marine shells, among which areProduct us Muricatus, CUnopistha Loevis, PJeu-rophorus Solenifommis, Gardiomorpha Missouri-ensis, Discina \itiiln. ScMzodus Ciuliis, the Mack shale there is usually a bed ofbluish-gray limestone, containing joints of crin-oidea and a few small brachiopods, among whichthe Spirifer lineatus and a small variety ofAthyris subtilita are the most eommou. The lower division of the coal measures, em-bracing the horizon of three lower coal seams,underlies nearly all the highlands in the centraland eastern portions of the county, and arefound outcropping on all the principal streamsand their tributaries. In tbe western part of thecounty, on Crooked Creek and the region lyingwest of that stream, tbe beds rise so that
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