TFIB CAMP-MEETING CUTTING. 683 



nearly 2 feet thick and rise up onto the back of the drumliu northwardly, 

 where they are sheared off abruptly by the third till, which here blends 

 with the second. 



Southward, the third till, which passes down the south slope of the 

 tbumlin, sinkin"- deeply into these sands, rises with an easy gradient up to 

 the surface of the sands on the east side of the cutting, its further extent 

 being uoav cut oft" by erosion; and on the west side rising in the same way to 

 within a foot of the surface and then extending 50 feet over the sands, and 

 finally thickening downward to 6 feet and ending abruptly in the sands in a 

 club-shajjed mass, the sands that rest against its south face being continu- 

 ous with those beneath it and like them in every way. From this point 

 the sands make the whole thickness of the wall, 24 feet, for a distance of 

 224 feet to the ravine, and crossing this (25 feet wide), the sands, with the 

 bottom nowhere exposed, run under a bed of cla"S', the same as that north 

 of the drumlin, and go on with a slight dip southward and fold over the 

 pink sands already described. They are here much thinned, and dip 

 beneath the surface near the south end (if the cutting. These are, for 

 the most part, coarse to ^-ery coarse, reddish sands, laid down by a strong 

 and steady southward current in la}'ers which are horizontal for long- dis- 

 tances or slig'htly inclined southward. Only for a few rods on the west 

 side and just south of where the third till rises upon them are they clean, 

 white, better-sorted sands, the cross-bedding dipping sharply north for a 

 time and then as sharply south,' and their eroded surfaces are covered by 

 a layer of well-worn beach pebbles. The bedding is everywhere, except 

 in the white sands, shar],)lv marked l;)y thin layers of very fine sand 2 to 6 

 inches apart, which are persistent for long distances, and which farther south, 

 where the sands have run beneath the clay, become layers of true clay, 

 and t(iward the top of the sands approach nearer by the thinning out of the 

 intervening sand layers, and so effect a transition into the clays. 



For a long distance south of the brook this arrangement is well devel- 

 oped. Layers of sand, beautifully rippled at surface and about 6 inches 

 thick, are capped by layers of clay, one-foiTrth of an inch thick, which 

 takes an accurate cast of the ripples below and makes the upper surface 

 more or less nearly horizontal. 



' These aro b.iek-set and fiout-set sands, in the terminology of Professor Davis. Bull. Geol. Soc. 

 America, 1890 p. 195. 



