LOWER CHALK—YORKSHIRE. 
229 
Stratigraphical Details. 
Zone of Ammonites varians. 
\ ; ^ i't Ji Ylvk Mi ,! j f. • ^ ’ ( 
The first good section through these beds is to be found in the 
railway cutting east of South Cave. The following details were 
taken by Mr. Hill on the north side of the line, 200 yards east of 
the signal-box at Weedly Springs, and continued at the east end of 
the short tunnel:— 
ft. 
“ Grey Bed,” or Totternhoe Stone (east of tunnel) 
Hard whitish chalk, rather rough - - - about 20 
Hard grey chalk, the lower part being gritty [or shelly] 
chalk, divided into courses by marl-bands - - - - 10 
Compact yellowish white limestone, rather broken, but appear¬ 
ing to graduate into the Red limestone below 1 
31 
Very few natural exposures or quarry sections of the Lower Chalk 
occur along the escarpment between South Cave and Leavening, but 
the basement beds are exposed in a small pit in Garrowby Park, 
half a mile east of the hall. 
A complete section through this zone is found in a slipped mass 
of chalk at Leavening, which shows : — 
<v 
rH 
o 
S3 
si 
e 
■ 
$■» 
e 
Grey chalk (see p. 232 for details) ------ 
'Hard whitish chalk in- fairly thick beds 
Seam of grey marl 
Thin-bedded chalk, rather rough and nodular, weather¬ 
ing into thin platy pieces ------ 
Hard greyish gritty massively-bedded chalk (Inocera- 
mus Bed) --------- 
.Hard crystalline reddish-yellow limestone - 
Selbornian. Red limestone with coarse sand below. 
ft. 
19* 
9* 
8 
6 
1 
There are pits near Wharram Grange by the railway near Whar- 
ram Station, on Scragglethorpe Brow, and at Iinapton Wood, but 
the chalk at all these places is much broken, and partly obscured 
by talus, so that the succession could not be made out. 
The upper portion of the Chalk Marl, rough, greyish-white, and 
weathering into platy pieces, is exposed on the slope of the deep 
combe west of Ganton Hall. Between 20 and 30 feet are visible, 
and Mr. Blake remarks that in this neighbourhood the Red Chalk 
(Selbornian) crops out near the 200 feet contour level, while chalk 
with Inoceramus mytiloidcs is seen at 450 feet, so that the thick¬ 
ness of Lower Chalk here may be as great as at Speeton. 
We now come to the cliff section on the coast east of Speeton 
Gap, the section commencing about half a mile east of the mouth 
of Speeton Beck, near a spot marked on the Ordnance map as 
q 2 
4219. 
