Historical encyclopedia of Illinois, ed . nd at the localities mentioned. Inthe shales, also, are seen numerous beautifulferns in a remarkably fine state of preserva-tion. This locality may be reckoned as oneof the best in the State tor collecting thesebeautiful and remarkable relics of an ancientvegetable growth. In the vicinity of Macomb the Colchestercoal seam is not of sufficient thickness to beworked to , as the borings for theartesian wells in that city have fully demon-strated. The borings in that vicinity at adepth of 1,700 feet were still in the St. Peterssandstone. About a
Historical encyclopedia of Illinois, ed . nd at the localities mentioned. Inthe shales, also, are seen numerous beautifulferns in a remarkably fine state of preserva-tion. This locality may be reckoned as oneof the best in the State tor collecting thesebeautiful and remarkable relics of an ancientvegetable growth. In the vicinity of Macomb the Colchestercoal seam is not of sufficient thickness to beworked to , as the borings for theartesian wells in that city have fully demon-strated. The borings in that vicinity at adepth of 1,700 feet were still in the St. Peterssandstone. About a mile and a half south-west of the town a thin stratum of coal out-crops above the sandstone quarries of Mr. Row-ley, which probably belongs to the Colchesterseam, though here only about a foot in thick-ness. This may, however, be an outcrop ofthe lower seam No. 1; but from the appear-ance of the sandstone it is more likely tobelong to No. 2, thinned out here to about one-half its usual thickness. In the vicinity of Colchester a very good. JAMES ARVIN HISTORY OF MrDOXOLGH COIXTV. 633 sandstone is found below the coal, from tento fifteen feet In thickness. It is No. 11, ofthe foregoing section, and is believed to bethe equivalent of the sandstone in the Mcl^^eanand Stewart quarries near Macomb. A sectionof the bed exposed in the vicinity of thesequarries shows this succession of strata: Thincoal, 1 foot: Shaly clay, 2 feet: Thin beddedsandstone, 1 to 6 feet; Massive sandstone, 10to 12 feef; Bituminous shale (coal No. 1), 4feet; Carbonate of iron, 1^ foot; Fire clay, Vifoot; Bituminous slate, or shale. 2-3 foot; Shale,5 feet. In the Colchester region, at most of theoutcrops examined, the same horizon was rep-resented by dark blue shales (No. 12 of thesection previously given), containing nodulesof iron ore inclosing crystals of zinc the southwest quarter of Section 24, Town-ship 5 North. Range 4 West (Tennessee), thefollowing beds were found exposed in con-nection with c
Size: 1414px × 1767px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbatemannewton18221897, bookcentury1900, bookdecade1900
