236 Geology of the Country near Easton, Penn. 
nal forms, with four and sometimes six regular sides. Phey 
resemble basaltic rocks. 
iluvial —many of the valleys and the shores of the riv- 
ers are partially covered by this formation, which consists 
of sand and clay, containing fragments of the older rocks. 
The following is a list of some of the minerals which are 
found near Easton. They were all discovered by Dr. 
Swift, who resides there, and who has been indefatigable i in 
his exertions to ascertain the minerals in his vicinity. The 
public are indebted to him alone for exploring this locality. 
In the Sienitie range of the Lehigh. 
-Hornblend and lamellar; two and a half miles 
daeence Sea “the old | Philadelphia road. 
Prase, at the same pla 
Chiorite, compact and aerealisend, do. 
Tourmaline, in imperfect crystals, 
Epidote, compact and crystallized. 
Sahlite, eight miles from Danan, by the side of the river 
road to Enis 
a, Magnet, es 5 
mmon Magnetic Oxide of fron, noe 
Mientangs Oxide of Iron, 5 sc 
Compact, Scaly, and Ochrey Red Oxide, o "Bp 
- Hematitic pro Oxide of Iron, compact ra 38 
and fi oe 
EReetecoons Oxide of Iron, E> = 
‘Titaniferous Iron Sand is found on various parts 
sienitic hills, after heavy rains. 
2. 
S 
m 
In the Sienite of Chesnut Hill. 
Sahlite, in small quantity. 
ourmaline, perfect, in veins with suerte 
Horn blende, compact, slaty. 
_ Epidote, compact and crystallized. 
Manganesian Epidote, in hexaedral prisms. 
-Chlorite. 
Micaceous Oxide of Tron. Red ot gi compact aot a 
Argillaceous Oxide. 
A 
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