528 • IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



of the Wilson residence there are numerous outcrops of the thick 

 limestone ledg-e with higher strata resting upon it. One-half 

 mile south of the Wilson house on Murder hill, named in allusion 

 to an occurrence that took place in a house the ruins of which 

 are at the foot of the bluff, is exposed fifteen feet of -the Forbes 

 limestone overlain by a complete section of the Braddyville for- 

 n^ation, the only one knowTi in the state. This outcrop includes 

 the Meadow, Union, Louisville, and South Bend ledges of the 

 Nebraska geologists. 



The upper ledge. South Bend, is the bottom rock of the Nod- 

 away coal. Across a ravine and less than two hundred yards dis- 

 tant is the old (juari-y in the bluff at the rear of Chas. Baldwin's 

 residence. The bottom of this ravine is on the fault line about 

 fifty yards north of the Baldwin house. It was not possible to 

 run a level between these two points by reason of trees and thick 

 undergrowth. However, the ledge at Baldwin's has approxi- 

 mately the same elevation as the Meadow ledge in ]\Iurder hill. 

 The downthrow of the fault to the south includes the Braddy- 

 ville, forty feet, City Bluffs, one hundred and twenty-five feet, 

 Nemaha, one hundred feet, McKissieks grove, fifty feet, the total 

 amount of displacement being about three hundred and twenty- 

 five feet. 



Keyes has named this deformation the Red Oak fault ; however 

 Condra and Bengtson's name Jones Point deformation has prior- 

 ity of one year and is moreover a more appropriate name as it is 

 not in all places if indeed it is in a majority of cases a true fault. 



All known outcrops on East Nishnabotna river from Essex 

 north to Stennett have been visited, the purpose being correlation 

 'of the different exposures and the study of the geologic structure 

 along this stream. From two miles southeast of Essex on Rocky 

 Branch no outcrop of Pennsylvanian rocks is known in the val- 

 ley of this river until ^lill creek south of Riverton is reached. In 

 the Page county report. Volume 11, Iowa Geological Survey, 

 Doctor Calvin in Plate No. 34 gave a view of the outcrop on 

 Rocky Branch as then exposed. Subsequent quarrying opera- 

 tions and erosion of the creek bed have uncovered a still lower 

 ledge of limestone. The section at present is as follows: 



