74 
THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
BY BEEBY THOMPSON, F.G.S., F.C.S. 
PART I. 
(Continued from page 43.) 
During the boring for water at Gayton, some three 
years ago, several of the Middle Lias beds were passed 
through, indeed all that are developed in this neighbourhood. 
For the section given below I am indebted to Mr. H. J. 
Eunson, F.G.S. 
Section at Gayton Boring. 
Feet In. 
1. —Surface soil ... ... ... ... ... ... 1 0 
2. —Alluvial clay ... ... ... ... ... 7 0 
8.—Shale, with the limestone of Fish and Insect-bed ... 0 4 
4. B.—Limestone rock, with Rhynchonella tetrahedra ... 2 8 
5. —Clay ... ... ... ... ... ... ... 2 8 
6. —Limestone rock, with Protocardium truncatum ... 4 4 
7. —Clay, containing Gresslya seebachii ... ... 7 0 
8. L.—Rock. A hard mottled stone, in which a good 
quantity of water was obtained. The boring 
actually commenced in this bed ... ... 2 3 
9. —Blue sandy clay, very micaceous, with Ammonites 
margaritatus ... ... ... ... ... G 6 
10. —Rock ... ... ... ... ... ... 0 9 
11. —Clay ... ... ... ... ... ... 2 0 
The boring was continued to a total depth of 994 feet, but 
through beds with which we are not here concerned. 
I have only personally examined beds 8 and 9 from the 
above section, hence it is perhaps advisable not to attempt to 
identify the beds 5, 6, and 7, which intervene between B 
and L. One thing is pretty evident: the Middle Lias beds 
here are not so fully developed as they are further westward, 
and this is confirmed by a section at Milton, about two miles 
east of the locality of Gayton boring. A well was being 
sunk at the brewery, and the proprietor, Mr. East, very 
kindly gave Mr. W. D. Crick and myself every facility for 
examining the beds passed through. 
Section of Well at Milton. 
Feet In. 
1. —Soil and clay ... ... ... ... ... 3 0 
Communis-beds. 
2. —Light blue clay, numerous small ammonites , 
chiefly A. communis ... ... ... ... 6 0 
