MIDDLE CHALK-—ISLE OF WIGHT. 
413 
found it again shown in the proper position, and took the following 
measurements : — 
Hard smooth white chalk with flints - 
r Hard rough nodular chalk without flints ; 
crushed Echinoderms are visible 
Seam of dark grey marly clay - 
Hard rough nodular chalk - 
Layer of green-coated nodules 
Hough knotty chalk, passing down into smooth 
white chalk ------- 
Smooth hard white chalk in thick beds, over - 
ft. in. 
15 or 20 
Terebra- 
tulina 
Zone. 
21 
0 
7 
0 
3 or 4 
40 
0 
2 
6 
6 
0 
He did not note the presence of the second layer of marl, having 
no idea at that time that it was of any special importance ; most 
probably it will be found to occur 7 or 8 feet above the layer of 
dark marly clay. 
The most complete and accessible section of Middle Chalk is that 
in Compton Bay, and this was carefully measured by Mr. Hill in 
1897, with the following results : — 
0) 
rH 
3 
CS3 V 
§ f"* 
S 00 
<s> 
a 2 
I-S 
^ «e 
Very hard rough knotty chalk with flints ; Holaster planus, 
Micraster Leskei 
/Hough nodular chalk, with occasional II. planus 
Seam of dark grey marl - - - - - 
Hard rough knotty chalk, without flints - 
A layer of hard yellowish nodules at the top of 
very hard rough knotty chalk - ■ 
Very hard rough lumpy chalk, Hoi. planus - 
Layer of irregular green-coated brownish lumps - 
Hather hard rough chalk, gradually passing down 
into smooth white chalk - 
Hard smooth white chalk in massive courses, 
divided by seams of marl - - - - - 
Hard white chalk in thinner courses, veined and 
streaked with greenish-grey - 
/Hard white chalk in massive courses, with many 
fragments of Inoc. mytiloides - - - 
Layer of yellow-coated nodules creamy-yellow 
inside, a conspicuous bed - - - - - 
Hard white chalk with many fragments of Inoc. 
mytiloides , also Rhynchonella Cuvieri, Cardiaster 
pygmceus , and Salenia granulosa 2 
Hard rough nodular chalk in thin courses, sepa¬ 
rated by seams of greyish marl - 
Very rough hard nodular chalk, in three courses 
\ separated by seams of marl - - - - - 
Lower Chalk (see p. 89). 
ft. in. 
8 
0 
1 
1 
3 
0 
0 
2 
0 
3 
6 
S 
V 
• ^ 
V. 
* CO 
53 
M-h ^ 
o so 
<x> 
o 
SJ 
6 0 
40 0 
25 0 
- 27 0 
1 0 
- 26 0 
6 0 
4 0 
About 150 0 
Fossils from the Middle Chalk of the Isle of Wight. 
This list has been drawn up from the following sources (1) Lists 
kindly sent to us by Mr. Ch. Griffith, of Winchester, compiled from 
specimens collected by himself and Mr. B. M. Brydone. (2) Col¬ 
lections made for the Survey by Mr. Rhodes. (3) Lists published 
