26 KENTUCKY GEOLOGICAL SURVEY. 



Kentucky is a very fine grained sandstone, but as it is traced 

 north the sand is found to gradually give place to clay and cal- 

 careous matter. 



At Newport the Eden is about 260 feet, thick, No sections 

 were met farther south which permitted measurement, so it 

 can not be stated whether the vertical thickness remains 1 the 

 same or decreases. 



The three divisions of the Eden, especially the lower divis- 

 ion, in the vicinity of Cincinnati, Newport and Covington have 

 yielded an extensive and varied fauna, as the result of many 

 years' collecting by many collectors. Comparatively few forms 

 are really common and they comprise the bulk of the fauna. 

 Dalmanella multisecta and Plectambonites sericeus are the 

 common brachiopods. In the field the Eden can usually be dis- 

 tinguished from the underlying Winchester by its shaly char- 

 acter and the invariable presence in its lower layers of Plec- 

 tdnibonites sericeus and CaUopora sigillarioidcs. Plectambo- 

 mtes sericeus occurs in the Winchester but isi rare; as soon as 

 the Eden appears it becomes abundant. 



Among the forms which range through the Eden are Batos- 

 toma implicatuni (Nicholson), CaUopora com munis (James), 

 CaUopora sicjUlarioides (Nicholson), Ceramoporella ohioensis 

 (Nicholson), Peronopora vera Ulrich, Stomatopora aracli- 

 noidea (Hall), Dalmanella multisecta (James), and Plectam- 

 bonites sericeus (Sowerby). This applies to the northern area. 



Exposures of Eden are very abundant, on account of the rap- 

 Id erosion to which it is subject. Only incidental attention was 

 given to the Eden in the fieldwork of the past summer. Expos- 

 ures were examined in the vicinity of Lexington, near the reser- 

 voir, where a fault has caused the preservation of some Eden ; 

 along the L. & N. IS. R. in Nicholas county between Park's! 

 Ferry Station and Carlisle; at the top of the Crow Distillery 

 section, five miles southeast of Frankfort, where the base of the 

 Eden is seen resting on the Winchester; at Falmouth where sev- 



