346 Subdivisions of the Paleozoic Strata of Great Britain. 
q fA a group bape cat of hard siliceous sandstone, 
= of vey coarse texture, and ng 
ato a conglomerate orm. It is very sterile of fos- 
sils, and the few which ae been found give no de- 
cisive Ltdines as to i och. Without any ob- 
1. Coniston grits, vious discordance of a fe it marks the com- 
the ook oa a of the May Hill sandstone, an 
a — o have the same place in the general 
a. Tower Ireleth slate : me and seldom applied 
to e asa roofing-slate. 
ee + tT] 
2. Ireleth slate-group of concretionary 
gre at thickness.* 
ea few very obscure fossils. 
& Upper. Treleth slate. “Man ny subordinate beds of 
grit, and many alternations; largely quarried. 
d. ee slate and grit ; seldom aelaed for roofing- 
is 
a, i‘. page of flags, grits, dic.; beds without 
good at ie cleavage. North side of Kendal 
Il and Valley of the eo des abundant ; 
Equivalents of Silurian Series, 
in 
6. Grit, Bea tsoebis in thick a "ad of coarse tex- 
3. Kendal group. ture ; flagstone ; be, ds of won 4 slate, generally 
without transverse cleavage; fossils in certain 
pee ab ~ dant, and of the Cine Ludlow type. 
The SE of Kendal 
¢. Tilestone, resembling that described in the “Silu- 
* fossils abundant, and of the Upper 
indice 
Collectively, the above series sok the Coniston grits to the 
Kendal group inclusive) is of very great thickness; yet, being 
almost without any subordinate beds of limestone, it is not so 
. prolific of fossils as the corresponding groups in Siluria. 
There are in the Woodwardian Museum, I believe, “166 ascer- 
tained species collected from the groups between the Skiddaw 
slate and the tilestone inclusive; and when these species are di- 
vided into two groups—the upper representing all the known 
ossil species down to the base of the Coniston grits, and the 
lower, all the known species below the Coniston grits—the two 
groups are found to have but five species in common. In other 
words, between the Cambrian and Silurian series in the north of 
England, there are not more than about three per cent of com- 
mon species, and some of those belong to types which are not 
confined to the Lower Paleozoic Division. 
e whole Silurian series of Westmoreland is overlaid by un- 
eittieemable and discontinuous masses of red conglomerate ; ge0- 
erally of very coarse pestciarhe wy sometimes passing i into red 
rou (sine a the fs ae is in great al ck “This ge seems t0 pass 
Sate, said 66 be MMS oi, top sobigveud (a) of Gee higher, ce Kendal, group. 
