I04 ILLINOIS ACADEMY OF SCIENCE. 



readily correlated directly with the member Dgh of the Fancy 



Creek section, by means of the fossils. A number of intervening 



exposures substantiate this correlation. The Fancy Creek section 



is as follows: 



Feet. In. 

 Dsh. Very hard, iron-stained, fine-grained limestone, containing. . 10 



Stroplicodonta concave Stroplieodonta perplana 



Dgg. Iron-stained, fine-grained, slightly crystalline limestone 1 



Athyris fultonensis Spirifer asper 



Cranaena iowensis Stroplieodonta demissa 



Dsf- Hard, slightly iron-stained, fine-grained limestone with nu- 

 merous coralla of 2 



Zaphrentis gigantea 



Dse. Hard, dark-gray, almost crystalline limestone, slightly stained 



by iron. Many fossils I 



Stylodictyon expansiim Lingulodiscina marginalis 



Cladopora prolifica Pugnax sp. 



Zaphrentis sp. Rcticidaria Umbriata 



Athyris fultonensis Spirifer iowensis 



CrancFua sp. Spirifer siibvaricosus 



Bellerophon pelops 



Dgd. Very hard, banded, black and gray, limestone with numerous 



stromatoporoids 4 



Cladopora pahnata Zaphrentis 2 sp. 



Cladopora prolifica Spirifer iozvensis 



Stropheodonta demissa 



Dgc. Rather soft, coarse-grained limestone, with many fossils 8 



Atrypa reticularis Spirifer iowensis 



Schizophoria striatula Stropheodonta demissa 



Spirifer etiryteines Phacops rana 



Dsb. Bluish to brownish, irregularly-bedded, fine-grained, lime- 

 stone with band of large Atrypa reticularis near middle. 



The fossils are 3 6 



Atrypa reticularis Stropheodonta demissa 



Crancsna iowensis Edmondia sp. 



Dsa. Gray, locally iron-stained, shelly and shaly limestone, con- 

 taining Spirifer ion'ensis and numerous small Atrypa 

 reticularis throughout. Athyris fultonensis and Spirifer 



euryteines are common near the top 3 



Streptelasma rectum Schizophoria striatula 



Orbignyella monticula Spirifer asper 



Athyris fultonensis Spirifer euryteines 



Atrypa reticularis Spirifer subvaricosus 



Crancena iowensis Stropheodonta demissa 



Cyrtina umbonata,\aT. alta SropJicodonta perplana 



From the foregoing sections, which include all of the Devonian 

 strata that are exposed in Rock Island county, a generalized sec- 

 tion of the Devonian rocks in this area may be constructed. The 

 lowest members of this generalized section, including all the 

 brecciated beds, are represented in the Cady quarry exposure in 

 East Moline. The uppermost member of the Cady quarry sec- 

 tion, the Phillipsastrea zone, N^k, is equivalent to E^c of the 



