141 Midway Stage 27 



To the north, about one mile, between the first and second hill 

 the basal Eocene and the uppermost Cretaceous beds can be seen 

 in an old field. Cretaceous beds in all instances occupy the brink 

 of the bluffs, but a short distance inland, only a few yards in some 

 instances, Midway beds appear. The uppermost bed of the Cre- 

 taceous that certainly has not been rehandled is a layer of hard, 

 bluish micaceous clay about 7 feet thick, generally poor in fossils, 

 resting on a bed replete with Exogyra and Gryphcea. Reposing 

 unconformably upon the bluish clay layer is a bed of coarse 

 granular friable sandstone; it is coarser below, with quartz peb- 

 bles, shark's teeth, rolled fragments of Bdeinnites, Exogyra, etc. 

 Higher up, this bed grades into bed e which is an impure clayey 

 limestone with man}' specimens of Encliniatoceras ulricJii, Turri- 

 teila mortoni, Crassatella probably gabbi, Cucullcea probably saf- 

 fordi, Ostrea pulaskensis, Venericardia alticostata var. , corals, 

 sharks' teeth, Tubiclostuim, et al. 



In the fields between the second and third hill north of the 

 Bluff it was seen that occasionally all the calcareous layers of bed 

 d furnish specimens of Encliniatoceras ulrichi. Bed c where it 

 outcrops in the highway at the foot of the southern slope of the 

 first hill north of Prairie Bluff furnishes many specimens of this 

 nnportant fossil. On the summit of the third hill to the north, 

 occupying a position 10 or 15 feet above bed a, some calcareous 

 rock fragments were found which from their altitude we were 

 inclined to regard as representatives of the limestone ledge seen 

 at Midway. A ver)^ large Enclimatoceras was obtained from one 

 of these fragments. 



Going westward from the Bluff one passes off from the Eocene 

 beds down into a slight depression and there finds numerous 

 Exogyrce and other Cretaceous forms. Gradually ascending from 

 this depression and carefully scanning the exposures in the road 

 ditches one finds Enclimatoceras quite plentifully. 



After going about % mile west from the river along the 

 Catharine road the Cretaceous-Eocene contact can be seen at the 

 roadside. The Eocene bed contains practically the same fauna as 

 that just described from i mile north of the Bluff. The fossils 

 collected here are E7iclimatoceras 2drichi, Crassatella, Cuciillcea, 

 Ostrea pulaskensis, Venericardia alticostata var., Yoldia eborea, 

 Tin^ritella mortoni, Scala, Tubulostiinn, sea-urchins, and sharks' 

 teeth. 



In a field about ^ mile northwest from the Bluff, bed c fur- 

 nished Pseiidoliva scalina and Turritella 7ierinexaf . 



In the same old field a few hundred 5'ards nearer the Bluff 

 specimens were obtained of Enclimatoceras idrichi, Fusus (large 

 cast), Turritella mortoni, Amauropsis, Crassatella, CucnllcBa, 



