362 IV. C. KNIGHT 



ice sheet. North and east of Holmesville there are a few iso- 

 lated patches of Dakota sandstone that have escaped glaciation. 

 In studying the Permian, work was commenced at Roca, but 

 on account of the slight exposure and the scarcity of fossils, no 

 detailed examination was made. A few specimens of Enteletes 

 hemiplicata (Hall) were all the fossils seen, and the vertical range 

 of this species is too great to allow it as evidence for or against 

 the Permian. In the vicinity of Beatrice, only two slight expo- 

 sures of yellowish shelly limestone were found. One of these was 

 just below the dam, on the east bank of the river, and the other 

 on the west side of the river in a ravine about a half mile south- 

 west of the upper bridge. These rocks 1 were barren of fossils. 

 By following the Union Pacific railroad down the river about a 

 mile below town, a slight exposure of very poor limestone was 

 found in a cut. From this point southward the limestone surface 

 along the bluffs gradually rises above the railroad grade which 

 follows the course of the valley. Three miles below Beatrice at 

 the old cement mill, the following section was taken : 



No. 4. Soil and drift ------ 4 feet 



No. 3. Yellowish shelly limestone - - - 4 feet 



No. 2. Cellular light gray limestone - - 13 feet 



No. 1. Bluish hydraulic limestone - - - 8 feet 



Total, - - ... - 29 feet 



No. 1 of this section was utilized during the seventies for 

 manufacturing hydraulic cement. Nos. 1 and 2 contained the 

 following fossils : 



Producttis seinireticulatus Martin. 



Ambocelia ftlanoconvexa Shum. 



Meekella striatioconstata Cox. 



Seminula argentea Shep. 



Bellerophon sp. 



From the old cement mill down along the river on the east 

 bank there are numerous exposures of the above section. At 

 "The Mounds" the Permian is capped with about forty feet of 

 brown Dakota sandstone, and the junction of the two formations 



1 Dr. Hayden reports two species. See final report of the U. S. Geol. Surv. of 

 Nebraska, p. 28. 



