380 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Mar. 9 
seams of marly clays, together with Terebratula maxillata, T. inter- 
media, and Clypei, adds greatly to the resemblance. I should be 
inclined, therefore, to assign them to the Forest Marble of East 
Gloucestershire and North Wiltshire.—J. Lycrrr.” 
Dr. Lycett has authorized me also to say that he considers the iron- 
stone beds of the Northampton Sand equivalent to the ferruginous 
beds of Glaizedale and “‘ the Doggers,” Yorkshire, but that he has 
not found sufficient evidence for identifying any part of them with 
the “ supra-Liassic ” sands of the Cotswold district.—S. Suarp. ] 
Fig. 5.—Diagram of General Section, showing the position of the 
Inferior Oolite Limestone and Divisions of Northampton Sand. 
Blisworth Clay ...( 2 ft.) ... ---pe=m 
White Limestone... (25 ft.) ... 
Great Oolite. 
SE 
WY) 
Blue Clay... (15 fh). oe 7 
Ferruginous band ....... gf Li 
; oe { Line of un- 
Place of Great Limestone of the Inferior Oolite ---- 
| conformity. 
Upper ... (eee Sani eeeaseeeee (12 ft.) ... - 
Plant-bed ...... 
rd 
A 
wm | Middle...4 Variable beds ...... (80 ft.) ... me 
A Inferior 
om : Oolite. 
roy) Limestone ( 4 ft.) 
A faimmlatonee sisi ia m 
oS 
a 
S Beds containing 
3 | Lower Nae Jronstone...... } (85 TE.) ove oe 
G 
Amm,-bifrons bed ... ---- 
Conctuston, 
Ihave thus endeavoured, however imperfectly, to illustrate the 
Oolitic geology of a portion of the county of Northampton, and have 
left ample material for further inquiry. 
Although the ground I have travelled over yields so much that is 
worthy of interest, an extension by a few miles of the field of 
investigation would bring other beds and other questions under 
review, which would amply repay for time and labour bestowed 
upon their examination. 
By including the Blisworth area in my present Memoir, I have 
added a member to my General Section in the Great-Oolite Clay 
which overlies the limestone in the Blisworth quarry, and which, 
I believe, was first detected as distinct from the overlying Glacial 
Clay many years ago by Professor Morris. 
