238 Geology of the Country near Easton, Penn. 
nal forms, with four and sometimes six regular sides. ‘They 
resemble basaltic rocks. 
Diluvial—many of the valleys and the shored the riv- 
ers are partially covered by this formation, which consists 
of sand and clay, containing fragments of the older rocks. 
The following isa list of some of the minerals hie are 
found near Easton. They were all discovered by Dr. 
Swift, who resides there, and who has been indefatigable in 
his exertions to ascertain the minerals in his vicinity. The 
public are indebted to him alone for exploring this locality. 
In the Srenitic range of the Lehigh. 
Hornblende, compact and lamellar; two anda half miles 
from Easton, near the old Philadelphia road. 
Prase, at the same place. 
Chlorite, compact and crystallized, do. 
Tourmaline, in imperfect crystals. 
Epidote, compact and crystallized. 
Sahlite, eight miles from Easton, by the side of the river 
road to Philadelphia. 
Native Magnet, \} ess 
Common Magnetic Oxide of Iron, ‘So ey 
Micaceous Oxide of Iron, 2 2 = 
Compact, Scaly, and Ochrey Red Oxide, So Sep 
Hematitic Brown Oxide of Iron, compact A 2S 
and fibrous, | = i 
Argillaceous Oxide of Iron, Se Ss 
Titaniferous Iron Sand is found on various parts ¢ of the 
sienitic hills, after heavy rains. 
In the Stenite of Chesnut Hill. 
Sahlite, in small quantity. 
Tourmaline, perfect, in veins with quartz. 
Hornblende, compact, slaty. 
Epidote, compact and crystallized. 
Manganesian Epidote, in hexaedral prisms. 
Chlorite. » 
Micaceous Oxide of Iron. Red Oxide, compact and scaly. 
Argillaceous Oxide. 
