480 
THE GEOLOGIST. 
DESCRIPTION OP THE SECTION OF THE UPPER GREEN- 
SAND AT THE UNDERCLIFF, IN THE ISLE OF WIGHT. 
By Mjr. Mark W. Norman. 
As the practical value of local details is admitted by all geologists, I 
have contributed the following statement of the Upper Greensand strata 
strata in the Isle of Wight, thinking it might prove of interest to the 
readers of the Geologist. 
The following table will convey at a glance the relative position 
and thifkness of the beds, and will serve to make the general observa- 
tions more readily intelligible : — 
SECTION OF THE UPPER GREENS \ND. 
Geet Chalk oe Chalk Marl. 
LowiR Chalk or Chalk Marl. 
" Upper Greensand. 
1 — Phospbatic Marl - - - 
2— Chloiitic Marl - . . . 
3_Great Chert Bed 
4 — Rag or blue limestone, and sandy l 
beds and cherty sandstone . . / 
5 — Firestone ■ 
6 — Freestone beds, alternating with ") 
blue rag ....... j 
7 — Sandstone beds, containing sandy] 
coiicietions, with beds of rag, 
ii.cludiug the " Whill Rag," [• 
and terminating with the " Big | 
Rag Bed." J 
8 — " Malm Bed," consisting of beds] 
of tougli sandstone, with layers | 
of rag in detached masses or ( 
nodules ------- J 
9 — A thick layer of sandy concretions, ] 
mottled with blacli, and ditl'ering j 
both in texture and substance 
from the beds above, the lower 
portion of which is termed the 
" Rubble Gault."- - - - - 
Gault - - 
Very fossiliferous. 
Fossiliferous. 
Fossils. One of the beds of 
chert contains fossil coni- 
fei'ous wood, silicified. 
Bones of 8aurians. 
Fossils. 
Fossils rare. Those found 
are chiefly Pectens, and 
are well preserved. 
Fossils. Siphoniee, Ammon. 
ites, Gri/phixcB, Serpulce, 
Fossils. Ammonites, Echi- 
nites, Astacus, ^-c. 
Fossils. Lima, Tnoceramus, 
Serpiil(c, Sf-c. 
Note. — The figures in the first column denote the average thickness of tlie 
beds described ; the second column gives the total thickness of the whole series. 
