2 q8 AUGUST F. FOERSTE 



4 inches in transverse diameter, lay in a trough in a horizontal 

 position. One pebble, 8X5X0. 5 inch, was imbedded on the eastern 

 side of one of the crests, but in a horizontal position. Two pebbles, 

 one on the eastern and one on the western side of the same crest, 

 were in a horizontal position. The steeper side of the ripple-marks 

 lies on the western side of the crests. The same layer is exposed 

 immediately north of the road bridge, with layer D about 3 feet 

 3 inches farther up. 



Layer G is exposed again at the small waterfall northeast of the 

 home of Charles Bailey. The crests of the ripple-marks here run 

 N. 3 W., the crests are about 28 inches apart, and the steeper slope 

 is on the western side. Here the following pebbles were noticed, 

 the dimensions being given in inches: one pebble, 10X7X1 inch, 

 in a horizontal position, imbedded along the crest of one of the 

 ripples; a pebble, 12X7X1 inch, in a horizontal position, buried 

 under the western half of a crest; a pebble, 38X 28X 2. 5 inches, in 

 a horizontal position, imbedded so that its upper surface is on the 

 same level as that of the surrounding rock. The moderately rounded 

 margins are slightly overlapped by the surrounding rock; and the 

 ripple-marks characterizing the latter are clearly defined as far as 

 the margin of the pebble, but are absent, of course, on the surface 

 of the latter. 



Layer G is exposed also farther down the stream, northward. 

 Here the crests of the ripples run N. 15 W., both sides of the ripple- 

 marks sloping equally. One pebble, 6X4X1 inch, was imbedded 

 up to its upper surface within the ripple-marked layer, and an 

 incrusting bryozoan overlapped one margin of the pebble and the 

 adjacent part of the surrounding rock, showing that enough time 

 elapsed before the deposition of the overlying clay bed to admit 

 of the growth of this bryozoan, the thickness of the latter being 

 about 3 or 4 mm. 



The pebbles in layer A were few in number. One pebble, 

 6X4X0. 5 inch, consisted of fine-grained rock, resembling the worm- 

 burrowed layer beneath the ripple-marked limestone. Farther 

 north, nearer the railroad bridge, several additional pebbles, 

 consisting of the same kind of rock, were found. The crests of 

 the ripples run N. 47 W., they are 20-30 inches apart, the inter- 



