7 
q 
: 
b 
VOL. XIV. (2) RHATIC ROCKS 165 
The fracture of the rock is conchoidal. The upper 
division is of similar lithic composition, but that portion 
of the bed in which the Psexdomonotzs is most abundant 
is the uppermost inch, which is fissile, and has a very 
smooth and even texture. Insect and fish remains are 
rare, more so than at Wainlode Cliff. Protocardium 
rheticum occurs as well defined casts, and agrees best 
with that figured by Oppel and Suess.’ An Arca was 
obtained: it is more elongate than Moore’s Avca Lycettt. 
Shales, similar to those occuping the same stratigraphical 
position at Wainlode, succeed. The Rev. Brodie procured 
from them Insects and “ Cypv7s,” and they also contain an 
occasional Pseudomonotis decussata. 
The basement bed of the Lower Lias caps these shales, 
and is in all respects similar to the equivalent stratum at 
Wainlode Clif'—Modtiola minima and Ostrea liassica being 
most abundant. 
The thickness of the Upper Rhetic at Garden Cliff is 
16 feet 4 inches; of the Lower, 19 feet 81% inches—a 
total of about 36 feet. Upon Wainlode Cliff there is thus 
an increase of about 8 feet. This difference is attributable 
to the thickness of the zzfra Bone-bed deposit at Garden 
Cliff, 6 feet 5 inches, as against 2 feet at Wainlode; and 
an increase at the former locality in bed 6, of 4 feet 
1% inches, as against IO inches, or possibly 18. Other- 
wise, the strata more or less correspond. 
2—THE CHAXHILL SECTION AND AREA. 
From Garden Cliff, the outcrop of the Rhetic strata, 
after making a considerable south-easterly sinuosity to 
Cleeve Green, runs from Wintles Hill in an easterly, and 
then north-easterly direction, to the Severn at Kings Head. 
1 “Késsener-Schichten ;” Sitzungsber. Akad. Wissensch. Wien, Vol. xxi., PIU; Bigcs: 
