1893.] 25 
[Griswold. 
draiiiiige would be formed, deve'lopiiig a series of ridges and 
valleys parallel Avitb the motion of the ice-sheet and transverse to 
its front. Tliis would cause the thicker accumulations of till in 
these valleys and we should expect to find drumlins, if formed 
from such accumulations, liaving a tandem arrangement in lines 
parallel to the direction of motion of the ice-sheet instead of lying- 
side by side and presenting a parallel arrangement to this front. 
General Meeting, December 7, 1892. 
President W. II. Niles in the chair. Fifty persons present. 
Mr. L. S. Griswold described some Indian (piarries in 
Arkansas. 
In the mountainous region of western central Arkansas there is 
an extensive formation of pure siliceous rocks, which furnish tlie 
well known Hot Springs' novaculites. The hardest portions 
of this formation were used by the Indians as a material of which 
to fashion some of their implements long before the advent of 
white men. The rock is brittle and breaks with a fine conchoidal 
fracture, giving sharp edges, so that it is particularly adapted to 
the manufacture of ])oints for arrows or spears, and such seems to 
have been its cliief if not its exclusive use. The points are now 
found throughout the region, and are made after many different 
])atterns. 
Although the rock is very generally exposed, the Indians 
learned, evidently, that the surface rock was not suitable for their 
purpose, and so at chosen localities they opened quarries. The 
work of quarrying was accomplished by means of hammers of 
tough sandstone or quartzite, aided by the action of fire. By 
tliese means pits of considerable size were excavated. At two 
localities in ]>articular the quarrying has been extensive; one 
about a mile east of Hot Springs on a spur of Indian Mountain, 
the other about two miles northeast of Magnet Cove. At the 
former locality there are three pits having the shape of inverted 
cones, averaging in size about sixty feet in diameter by twenty in 
depth. The present form is not the original one but has been 
given by the falling in of the waste chips which were piled high 
around the edges of the pits. At the same locality stone was also 
quarried from bold ledges on the mountain side. Near Magnet 
