1878.] Glacial Drift in North America . 59 
the horizon from which he had obtained some of the imple- 
ments in undisturbed ground. 
Towards Trenton the bluff approaches the river, and just 
below the town forms its bank. The face of the bluff is 
Fig. 1. 
1. Sandy clay, 3 to 6 feet, with large boulders on surface in some places. 
2. Alternations of gravel and sand, occasionally false bedded, 6 to 10 feet. Stone 
implements. 
3. Unstratified pebble and boulder bed. Thickness very variable. 
C. Cretaceous marls and clays. 
mostly a talus ; there are few good sections, and none that 
I saw were perfectly satisfactory. The best section was 
near the cemetery, where I made the sketch shown in 
2 
3 
2. Irregularly stratified sand and gravel, with occasionally larger stones inter- 
mixed, about 12 feet. Stone implements. 
3. Thick unstratified bed of pebbles and boulders, mostly rounded, with many 
stones up to 15 inches diameter ; larger ones rare. Base of deposit not seen. 
Fig. 2. The lower bed (No. 3) is quite unstratified ; only 
the upper 12 feet of it is seen where the section was taken, 
the lower part being covered with talus, but in other places 
Fig. 2. 
