438 
THE CRETACEOUS ROCKS OF BRITAIN. 
and the thickness of the zone is much less than it is near Beer ; 
moreover, southward, above the beach, the middle part of the 7- 
foot bed can be seen to thin out, the total thickness being thus further 
diminished. The streaky chalk seems to represent the Beer Stone. 
At Beer Head the chalk of this zone can be reached again in a 
small gully above the fallen blocks a little west of the headland 
itself, and here the thickness is still further reduced, the succession 
being as follows ft. in. 
Soft 
~s5 
5* 
-si 
<4h 
o 
a> 
rH 
o 
S3 
white chalk with layers of black flints. 
Soft chalk without flints. 
Hard solid yellow limestone, welded to the top of 
the bed below ------- 
Rough nodular shelly chalk with Car diaster pyg- 
mceus , Discoidea Dixoni , and Cidaris spines - 
Hard nodular chalk, with a few scattered grains 
of glauconite ------- 
Hard yellowish limestone with defined upper sur¬ 
face ; contains much quartz and glauconite 
1 6 
0 6 
6 6 
5 0 
1 9 
15 3 
The basement bed here contains more quartz and glauconite 
than it does to the northward, and there are hollows filled with 
glauconitic sand between it and the bed below (see p. 134). There 
is nothing which can be identified as Beer Stone. Between the 
upper yellow limestone and the overlying chalk the^e is a marked 
plane of division, and this might be taken as the summit of the zone, 
but I take the next 18 inches to represent the highest 2-foot bed 
at Pounds Pool. 
From this point toward the west and north-west the zone swells 
out again. The whole of it can be measured in the “ Pinnacles,” 
which are huge detached masses which have slipped from the eastern 
end of Hooken cliffs, and are part of the great landslip of 1790. 
Here the basement bed has the same thickness as at Beer Head, 
but it rests on a bed of chalky glauconitic sand (see p. 133), and is 
overlain bv 7 feet of very gritty, yellowisli-grey chalk, succeeded 
by about 12 feet of rough nodular chalk, including a bed of hard 
yellow compact limestone at the top, 9 inches thick. Here, there¬ 
fore, the zone is 20 feet thick. 
The next point where these beds can be reached is in the cliff 
below the coast-guard station by means of the long talus slope 
mentioned on p. 135. It was at this place that Mr. Meyer took the 
section on which he based his paper. The following are the beds 
which seem to be referable to the zone of Rhynch. Cuvieri, and the 
prefixed numbers refer to those in Mr. Meyer’s succession : — 
feet. 
17. Compact streaky chalk, with a few scattered flints 
and a layer of flints at the base - - - 6 
'16. Rough chalk full of hard lumps, but with 12 
inches of streaky chalk in the middle - - -13 
15. Compact even-grained streaky chalk ; this seems 
to be the Beer Stone ----- 6 
, 14. Hard nodular chalk, passing down into rough 
gritty chalk with hard lumps. I took Oalerites 
subrotundus from, the' base of this - - - 
* 
7 
