278 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Mar. 8, 
Nieuman, a shaft has now been sunk through the second salt, proving 
it 96 feet thick at that locality. At other places it has been pene- 
trated to a depth of 117 feet without being sunk through. 
The following is a section of this sinking :— 
in. 
a. Compact light blue and brown laminated stone .... 5 8 
6. Red salt with veinsvof clay 2.22.2. J25s: Pee 6 7 
e| Pale red Salt); 2.1728 Sig BS fe SEs See ao ha 
d. Compact laminated brown stone with thin lamine of 
Sale 20 ede ee STL. Ge rr 
e.\ Pale, red. salt, 3. 3.00 Liss. See eb ee 6 0 
jf. Compact laminated brown and blue stone traversed 
with thin veins of salt . 6 
g. Lowest. bed of salt variable in soe from white to 
red, with a slight admixture of blue clay ...... ll 6 
h. Compact laminated brown and blue stone ........ 17 
z. Hard light blue stone with splintery fracture, with 
small detached crystals of salt................ 9 0 
k. Compact heavy laminated stone, brown and blue, with 
small portions of salt between the lamine (bored 
INGO) wig oF YS A od a eh Se 1] 
151».4 
The depth from the surface to the lowest pomt of these borings is 
therefore, taking the average, — 
ft. in 
From the surface to ere bed! "CEI. 127 0 
Highest bed .. eR: 
S11) LR LE 4 ga MR AOS SEY UT 30 0 
Second ted! =) i 8 s 10 eet Sees 106 0 
Borings' at’ Marston 2.'.2.2 2", 2) 2 et ae 
Inall.... 499 4 
The constant working of the brine and salt at Northwich has caused 
alterations, and occasionally extensive subsidences of the surface. To 
the melting of the upper surface of the rock-salt is to be attributed 
the irregularity of its surface and the contortions of the beds overly- 
ing it, evidently origimally deposited on a level surface. 
Along the river Dane no sinking has taken place, and the bridge 
over the Dane at Northwich is firm. 
The highest pomt up the Weever at Castle Northwich at which 
the land sinks is at the Navigation-yard on the western side of the 
river, a little to the south of the bridge. The sinking here is upRenis 
of eighteen inches towards the river. 
Near this place the road to Chester has sunk six feet at least; to 
the west of this point by the road towards Winnington Bridge ‘the 
subsidence of the ground is shown by the cracks in various houses. 
On the west side of the river the bank has also sunk. Above the 
Dane-bridge no signs of sinking are apparent, but between the bridge 
ee a _ 
