CORNBUASH : APPLEBY. 
Many of the species were obtained by Mr. W. D. Carr, of 
Lincoln, and others by Mr. John Rhodes. It will be seen that 
the list corresponds closely with those of species obtained from 
other parts of the country. The number of Gasteropods is larger, 
but they are by no means abundant, and too poorly preserved, as 
a rule, for specific identification. 
Further north, although fossils have been obtained near 
Normanby and Bishops Norton, there are no very good sections. 
The total thickness of the Cornbrash is from 3 to 5 feet, and 
as remarked by Mr. W. A. E. Ussher, it is the most distinctive 
and persistent member of the Great Oolite Series. Nevertheless 
there are beds locally present in the Great Oolite Limestone of 
Lincolnshire, which are hardly distinguishable from it.* (See 
p. 428.) 
Wherever there are exposures along the valley of the Ancholme, 
there the Cornbrash, presenting its ordinary characters of rubbly 
and fossiliferous limestone, is present in this northern tract not 
exceeding 3 feet in thickness. It is possible, as suggested by 
Mr. Ussher, that the beds are faulted on the west side of Brigg, 
for the Lincolnshire Limestone appears at the surface at so short 
a distance in this direction. f 
Fossils have been obtained by Mr. Ussher to the east of 
Waddingham, and further north, to the west of Atkinsons Cover, 
and south of Gander Hill. The Rev. J. E. Cross obtained a 
large collection of fossils from the Cornbrash near Appleby, the 
rock being well exposed near the railway-station, and by Thorn- 
holme Priory. From this region near Appleby, many of the 
species noted from Sudbrook have been obtained, and to these 
may be added Avicula braamburiensis, Oslrea Sowerbyi, Trigonia 
striata, Waldheirnia lagenalis, &c. 
Cornbrash is not again seen, beyond a mile north of Appleby, 
for at Winterton Holme the probable outcrop was masked by Drift. 
On the northern side of the H umber near Elloughton and 
South Cave, the Cornbrash has nowhere been identified, indeed as 
Mr. Fox-Strangways remarks, from the most northerly exposure 
near Appleby in Lincolnshire, it is not again seen until \\e come 
to the north side of the Yorkshire basin, a distance of about 
46 miles. 
It was questioned by Lycett whether the Cornbrash of York- 
shire is equivalent in ag*e to the beds in the district to the south ; 
but the assemblage of fossils is BO strongly in favour of their 
identity, that it is difficult to understand how any doubt should 
have arisen.:}: The beds are described by Mr. Strangways as con- 
sisting of grey rubbly and iron-shot limestone, partially oolitic, and 
a few feet in thickness : they are overlaid by about 6 feet of finely 
laminated bluish-grey shales, containing Avicula echinata, &c. 
* Geol. Lincoln, p. 70 ; and Geol. N. Lincoln, p. 86 ; see also Judd, Geol. Rutland. 
p. 187. 
f Geol. N. Lincoln, p. 93. 
j Supp. Monograph on Gt. Oolite Mollusca, p. 117 ; see also Judd, Geol. Rutland, 
p. 9. 
