462 CHARLES S. PROSSER 



Harshaville, 4 miles southeast of Seaman, Adams County. The 

 ripple-marks in the highest limestone layer below the bridge run 

 about N. 6o° W. and have the more gradual slope to the east of 

 south, and the more abrupt to the west of north. The crests vary 

 from 20 to 28 inches apart. In another limestone layer about 6 

 inches lower than the first one the ripple-marks run north and 

 south, with the steeper slope to the west and the more gradual one 

 to the east. The crests are from 20 to 30 inches apart. Over part 

 of the floor of the creek below the bridge is a less distinctly ripple- 

 marked layer between the two which have just been described. 

 These run almost directly northwest and southeast, the crests are 

 from 22 to 28 inches apart and are rather flat, and the slope is 

 about the same on each side, making them nearly symmetrical. 

 The northeast slope on a few of them is a little steeper and these 

 do not have such flat crests. Perhaps the tops of the crests of the 

 others have been worn away, which gives them the present some- 

 what flattened form,. 



Trebers Run. — This stream is a western tributary of Lick Fork 

 (called Lick Creek on the Highway Map of Adams County), about 

 5 miles northeast of West Union, i\ miles below Young's Chapel, 

 about a mile above Dunkinville, and 9 miles southwest of Peebles. 

 On the southern bank of Trebers Run, about 150 yards above the 

 covered bridge on the West Union and Jacksonville Pike, is a 

 ripple-marked limestone layer exposed for 90 feet or more along the 

 bank. This limestone layer is in the upper part of the Richmond 

 formation. At the time this locality was visited the streams were 

 high and the layer was partly covered by water, so that the con- 

 ditions were not especially favorable for study. Three adjacent 

 ripple-marks run as follows; N. 12 E., N. about 12 E., and the 

 third one about N. and S. The distance between the crests varies 

 from 2 feet 2 inches to 2 feet 7 inches, while the depths of the 

 furrows (troughs) is from 2\ to 3 inches. The eastern slope of the 

 ripple-marks is perhaps a little steeper; but there is comparatively 

 little difference in the slope of the two sides. There is a heavy 

 dip for this region downstream to the east, and certain layers on the 

 northern bank some rods farther up the run dip from 4? 5 to 5 N. 

 ioo° E. 



