240 ILLINOIS STATE ACADEMY OF SCIENCE 



limestone which outcrops in the creek bank to a 

 height of 8 to 10 feet. The horizon is not many feet 

 below the base of the Silurian which was encountered 

 in a water wall put down near the outcrop. The fossils 

 collected at this locality include the species listed below : 



FOSSILS FROM THE UPPER PART OF THE RICHMOND NEAR 

 KINGSTON, ILLINOIS 

 Amplexopora sp. (c) 

 Arthropora shafferi (Meek) (r) 

 Batostoma sp. (c) 



Bythopora delicatula (Nich.) (r) W. L. Wh. 

 Bythopora meeki (James) (a) W. L. Wh. 

 Bythopora striata Ulr. (r) W 

 Hallopora subnodosa (Ulr.) (a) Richmond 

 Hallopora cf. subplaua (c) 

 Perenopora decipiens Rom. (c) A. E. 

 Stigmatella spinosa U. & B. (c) W. 

 Stomatopora arachnoidea (Hall) (a) W. 

 Lingula sp. 



Dalmanella testudinaria (Dalman) (c) 

 Rafinesquina alternata (Emmons) (c) 

 Pterinea sp. 



Calymene meeki Foerste (a) 

 Isotelus maximus Locke (c) 

 Synhomalonotus christyi (Hall) (a) W. 



An exhaustive collection of fossils was not attempted 

 at this place on account of their poor preservation, but 

 the species indicate clearly the Waynesville division of 

 the Richmond, and show also the close correspondence 

 of the Richmond at this locality with that in the vicinity 

 of Oswego, and northwest of Minooka. The trilobites, 

 Isotelus maximus and Synhomalonotus christyi, came 

 from a level a few feet below the upper, more calcareous 

 strata from which the greater number of the bryozoa 

 species were collected, as they did in the Fox River and 

 Aux Sable Creek localities. 



West of the LaSalle anticline in the northwest part of 

 Illinois, the lower Richmond (Maquoketa) shale is well 

 exposed in a cut along the Illinois Central Railroad a 

 short distance west of the station at Scales Mound, in 

 Jo Daviess County, where it is immediately underlain by 

 Galena limestone. The detailed section is given below: 



SECTION OF RICHMOND STRATA AT SCALES MOUND, ILL. 



Ft. 

 Maquoketa shale 



Shale, bluish-gray, without fossils 32 



Shale, blue, with a reddish zone near the base, and another 

 about 8 feet above the base; containing several small fossils. 11 

 Galena limestone 



Dolomite, yellowish-brown, in layers 6 to 18 inches thick 6 



