382 = T. ©. Chamberlin— Hillocks of angular Gravel 
served, is from the smaller grade of gravel, which presump- 
tively suffered more transportation and rolling than the larger 
fragments. 
Striated limestone fragment, natural size, from the above locality. 
These specimens were taken from a representative collection 
n. Fig 
The character of the sand and clay comports perfectly with 
the derivation above indicated. e sand, instead of the 
familiar well worn grains of quartz, consists, in large part, of 
particles of limestone with which are mingled minute frag- 
ments of shale and some rounded grains of quartz. Numerous 
acid tests of these sands made in the field invariably elicited 
prompt and active effervescence, which indicates unleac : 
limestone particles. Under the lens, the grains present, in the 
main, clean fresh surfaces of characteristic textn 
A 
character, 130 grains, selected indiscriminately from the small- 
could b | 
less than 1™ in diameter) were dropped in succession 1nt0 
dilute hydrochloric acid slightly warmed. These were D 
