Geology and Mineralogy of Salisbury. 255 
do the south si of the town the limestone presents a 
curious appear: _In an abrupt hill of mica-slate seve- 
ral handred feet i in an it forms a regularsegment of acir- 
cle supporting the slate. The ledge where this i is seen. to 
best advantage is p lar, about seven 
ty feet high. The limestone risessity feet, and graceful 
ending forms the arch. The rocks are united so as A 
present the appearance of having come in contact when _ 
a state of partial solution. The hi mestone. is genes ee 
a, appears to form the nucleus of the hill. al 
The dolomite of this region is to a great extent exile, 
nd much resembles the magnesian limestone of § 
nd, Eng. Like that it ag le in acids as Fendt ‘a 
ure carbonate of lime. Its flexibility however does not 
pear to diminish by loss of moisture. Pieces of a small 
size which have lain on the surface of the ground for years. 
appear as flexible as when newly dug. In this respect ~¥ 
80,1t resembles the Sunderland limestone, — flexibility 
Temains after the water has entirely esca 
- The surface of the limestone is often cachsbe by the de- 
composition of sulphuret of iron, besides whieh it Contains 
» sos Priel ens sis seas &ec. 
SEES 
| Altuvial. — 
“The alluvial deposit of this town is of collsidarable ex- 
tent. cas Eaton’s division e primary and icsecrmsk 
the banks 0 e *Hooe 
tons ore ea wash from the bank in sea a 
state of preserv Trees also are fear 
>, which have ae been hid for centuries.— 
vhen, Baposed to the atmosphere, soon, sae 
4 us = Simple Masai £6 : 
bonat e of Line, abundant, icici Er ike ites 
cent, intersected with Calcareous Spar, both crystallized 
“See Pres. Dwight’s Travels. 
