THE CRETACEOUS ROCKS OF BRITAIN. 
47 6 
A chalk-pit about a quarter of a mile north of the church at 
Icklingham St. Janies shows about 12 feet of rather hard thin- 
beddeu chalk, with a few small flints. The only fossils seen 
were Terebratulina. Another pit is opened near Avenue Farm, 
about a mile north-west of the church, and this shows about 7 
feet of similar chalk containing a few fossils which, however, are 
not easy to extract. Those found were Terebratula semiglohosa, 
Rhynchonella Guvieri (small circular variety), Terebratulina 
(Hata), Plicatula Barroisi and Inoceramus Lamar chi ?. 
North of the river Lark the surface of this part of the Chalk is often 
deeply covered with blown sand, but there are places where chalk 
comes to the surface. A quarry by the high road, east of Eriswell, 
is opened in soft white chalk without flints, but containing Galerites 
subrotundus and some Inocerami; it probably belongs to the 
lower part of this zone. 
In the southern part of Norfolk the only exposure of this zone 
seen by Mr. Hill or myself is that of a quarry at the western end of 
North wold, about three miles south-east of Stoke Ferry. It shows 
about 36 feet of soft but firm white chalk, well-bedded, and includ¬ 
ing several thin layers of grey mail. The lower beds are the firmest, 
and have been quarried for building purposes ; they yielded Galerites 
subrotundus, Inoceramus mytiloides, Terehratula semiglohosa, and 
a small Rhynchonella (? var. of Guvieri). These beds probably 
form the top of the Rh. Guvieri zone; the upper 12 feet are softer, 
and contain some scattered flints. 
Exposures of this zone coukl doubtless be found along the country 
north of Gooderstone, and east of the outcrop of the Melbourn 
Rock, but no one has looked for them. 
In the more northern paid of Norfolk the chalk of this zone par¬ 
takes of the prevailing tendency of all the lower beds to become 
harder and more compact, the thickness at the same time becoming 
less. Moreover, the fossil which is so common in more southern 
counties seems very rare in Norfolk, so that it is often difficult to 
be certain of the zonal horizon of any small exposure. 
In the memoir describing the north-western part of Norfolk and 
explanatory of sheet 69 (old series),* many pits are mentioned which 
seem to be in this zone, but only three of them are worth special 
notice. 
The first of these is at Fring, a little south-east of the church, and 
shows about 30 feet of solid white chalk, with a layer of flints near 
the bottom, and two others in the upper part. The only fossils 
found were Rhynchonella Guvieri and Galerites subrotundus. 
The second is a quarry south of Eingstead St. Andrew, near Hun¬ 
stanton, which is about 25 feet deep in hard chalk, veined irregu¬ 
larly with grey marly material, and containing a few grey flints. 
* Geology of the Borders of the Wash, Mem. Geol. Survey, 1899. 
