POWELL MORAINE. 529 



BOWLDERS. 



Surface bowlders are not conspicuous along the Powell moraine. On 

 the whole they are no more numerous than on the intramorainic tracts, and 

 are far less numerous than on the main moraine or on parts of the Missis- 

 sinawa moraine in northeastern Indiana. 



STRI^. 



In the list of striae given in connection with the description of the 

 main morainic system those are included which were observed in the district 

 traversed by the Powell moraine. They are in its eastern and southern 

 portions. In the western portion of the Scioto Basin the drift is too thick 

 to allow outcrops, but farther east outcrops occur and strige are found. 

 Whether these striae date from the time the Powell moraine was forming or 

 from an earlier time is not determined. 



The following list includes those which lie in the Powell moraine or 

 between it and the next later one. The first three are on sandstone, the 

 remainder are on limestone: 



Table of strke. 



Bearing. 



Iberia, 2 miles south of, in a quarry S. 28° E. 



Sunbury, 2 miles north of, on Walnut Creek S. 45° E. 



Sunbury, on Walnut Creek S. 45° E. 



Powell, west of, on Scioto River S. 16° E. 



Near Jerome, in quarry S. 9° E. 



Jerome, 2 miles north of, in Evan Piersol's quarry S. 3° E. 



Big Springs, on hill north of village S. 8° W. 



Big Springs, Ij miles west of, in Musselman's quarry S. 10° W. 



Belle Center quarry, northwest of village S. 10° W. 



OUTER BORDER PHENOMENA. 



Under this head are considered only those deposits which may be 

 dependencies of the moraine, tlie other deposits having already been 

 discussed. 



Along Darby Creek considerable gravel and sand occurs, but this 

 deposit is doubtfully classed as an outwash from the moraine, because it 

 slopes toward the moraine instead of away from it. There is usually a 

 descent in gravel plains in receding from the moraines which they border. 

 But the slope of this plain is such that the stream flows near the north 

 border of the gravelly tract next the moraine instead of at the southern 

 border. 



MON XLI 34 



