170 



GEOLOGY OF LA SALLE COUNTY. 



A. Coal Run's Shaft, Streator; B. Boring', 

 Munster; C. Boring- near Ransom. — Records of Ar- 

 tesian Wells. 



STRATA. THICKNESS. 





Str't'r 



Utica. 



Ped'crds 



Drift 



39 



5 



268 



Coal Measures 



211 



00 



000 



Trenton Limestone 



203 



00 



90 



St. Peters Limestone 



225 



12 



290 



Calciferous Limestone 



70 



90 







133 



128 



'617 



White Limestone 



211 







White Sandstone 



37 







Limestones — Sandstones 



1022 





*579 



Shales into Potsdam S., 



333 





344 



Total 



2496 



235 





Records of Shafts and Bearings. 



STRATA. THICKNESS. 





A 



B 



C 



Drift 



20 ft. 



20 ft. 



300 



Hard Clay (Soapstone) 



30 





1^ 



Coal Number 7 ? 



5 









10 







Streator Sandstone 



23 



13 " 





Coal Number 6 



0 







Soapstone, dark 









Coal No. 5, Black Slate 



4 



12 " 







27 







Black Slate 



2 



2-4 in 





Coal Number 4 





10 





Fire Clay 



11 







Coal Number 3, &c 



4 







Black Slate 



2 



24'" 



48^ 





12 



3 



3 



Coal Number 2 



10 







Fire Clay 



2-4in. 







Soapstone 



2y2 





into 50 



Trenton Limestone 



36 





