RICHARDSON : THE LOWER OOLITIC ROCKS OF YORKSHIRE. 185 
Table I. — Sequence of the Lower Oolitic Rocks of the 
Yorkshire Coast. 
r(i) 
(2) 
(3) 
Shales, dark -coloured : a few feet thick at the Wyke, fi to 8 feet 
thick in Xewton Dale. 
to 2 ft. 
at the 
Wyke 
j More compact in 
. Newton Dale and 
I 7 to 8 ft. thick. 
Limestone, dark, full of fossils 
(see below), passing down 
into . . 
Shales, impure, calcareous . . 
*OrnUhella lagenalis (Schloth.), *0. obovata (Sow.) and the varieties 
called " stiltoncnsis " and " siddmgtonensis " by Walker. 
Rhyn. leedsi Walker,* Echinobrissus orbicularis Phil.,* Holectypus 
depressus (Leske), Pleurotomaria gramdata (Sow.). 
Cucullaea clathrata Leckenby.* Goniomya litterata (Sow.) Phil.,* 
Lima rigidula Phil., L. helvetica Oppel, Protocardia citrinoidea 
(Phil.), Homomya crassiuscula M. and L., *Trigonia scar bur gensts 
Lye, T. elongata (Sow.),* Isocardia nitida Phil.,* 
Alectryonia sp., Pleuromya sectiriformis (Phil.),* P. decurtata 
(Phil.),* Serpula intcstinalis Phil., S. tetragona Sow., S. 
" sulcata Sow.," etc. 
Upper 
Estuarine.- 
Scarborough 
Beds 
{blagdeni and 
sauzei). 
i Middle 
Estuarines 
{? witchellice- 
shirbuirnice) 
Approximate thicknesses 
in feet of the beds iu 
the cliff-sections. 
(*after Jukes-Browne). ; 
Thin beds of sandstone or quartzite 
and shale resting on extremely ir- 
regularly bedded sandstones and rl20 to 200* 
the.se on 
THE MOOR GRIT 
These beds are usually divisible into 
three portions : 
(a) In which shales predominate : 
Belemnites ellipticus Miller ; 
(6) In which the arenaceous element 
preponderates and is often a 
grit rich in isocrinoid ossicles — 
CRixoiD GRIT ; and 
(c) That in which limestones are most 
in evidence : Gervillia scarburg- 
ensis Paris . . . . . . , 
Sandstones, sandy shales and thin j 
coal-seams. Rich " plant-bed " at - 
20 to 90* 
y Gristhorpe Bay 
50 to 100* 
Millepore 
Bed 
{? discitce) 
Lower f 
Estuarines J 
{? concavi- | 
bradfordensis) \_ 
Dogger r 
{murchisonce J 
^ and ? scissi). I 
Limestone, hard, and ferruginous in 
places on the coast, at other arena- 
ceous, and at Whitwell and Cave V 20 to 40* 
a thick " oolite " : Spiropora 
straminea (Phil.), etc. 
Sandy beds with massive sandstones ^ 
in their lower portion and a marine I 
band 
Bed 
called the " Eller-Beck 
The Xerin-Ea-Bed and 
deposits or Dogger . . 
associated 
-200 to 280" 
in 
