THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
77 
Feet In. 
5.—Green rock... ... ... ... ... ... 6 0 
G.—Rock binds... ... ... ... ... ... 2 0 
7. —Hard green rock (fossils) ... ... ... ... 7 6 
8. —Strong rock binds (fossils) ... ... ... 2 6 
9. —Hard binds... ... ... ... ... ... 3 6 
10. —Binds (fossils) ... ... ... ... ... 8 0 
11. —Hard grey rock ... ... ... ... ... 2 6 
12. —Rock binds... ... ... ... ... ... 3 6 
13. —Light coloured rock ... ... ... ... 1 6 
Clay, with bands of ironstone, cement stones, 
shell bands, &c. Twenty-three hard beds ...545 0 
Bottom of Lower Lias clay ... ... ...738 0 
Of course from the above description it would be im¬ 
possible to identify the various beds except by analogy in 
the sequence, and using this method, I should consider the 
various beds to be as follows:—(3) Cephalopoda-bed, (5) 
Lower Cephalopoda-bed or Fish-bed, (7) Rock-bed B, (11) 
Bed L. Comparing beds 7 to 11 in the above section with 
beds 4 to 8 in the Gay ton one, a remarkable resemblance will 
be noticed in the thickness. If I have correctly indicated the 
beds 3 and 5, I cannot help thinking that their thicknesses 
are greatly exaggerated, and the intervening clay beds 
proportionately decreased. My chief reason for accepting 
the sequence of beds and doubting the figures, rests on the 
fact that, by permission of Mr. J. Eunson, C.E., F.G.S., I 
myself measured what I considered to be the same beds 
within a mile of the Kettering Road section, at the old 
Water-works well on the Billing Road, Northampton, and 
I found the beds to be as follows:— 
Feet In. 
1. —Hard bed, containing very many ammonites, large 
nautili , (&c . ... ... ... ... ... 0 9 
2. —Clay, containing A. communis, &c.... ... ... 2 6 
3. —Limestone, splits into slabs, with A. communis , dc. 
Did not certainly identify as Fish-bed ...5 or Gin. 
4. —Clay ... ... ... ... ... ... ... 2 8 
5. —Marlstone Rock-bed... 
With regard to the character of the Middle Lias eastward 
of Northampton we know at present very little. There is 
distinct evidence of the occurrence of the Rock-bed seventeen 
miles to the N.E. of Northampton, and equally clear evidence 
of the total absence of the Middle Lias near to Peterborough. 
(To be continued.) 
