40 
THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
sandy marl may be seen forming the bank of a stream, but 
little can be now made of the section ; it has yielded PJiyn - 
chonella tetrahedra, and so probably belongs to the “ Sp hiatus” 
Zone, though the hard bed over which the stream runs 
belongs, I believe, to the “ Henleyi ” Zone. 
At Market Harborough there are two brickyards in which 
the Middle Lias clay is used ; the one in the town shows the 
following section:— 
Section in Market Harborough. 
About 
Feet In. 
1. —Soil.1 6 
2. —Light blue or grey clay, containing some mica. 
Thickness varies owing to inclination of beds 8 0 
3. —Band of concretionary ironstone, upper surface 
sharply defined, but not the lower, containing: 
Belemnites, Gasteropods , Pecten cequivalvis, 
Protocardium truncatum, Terebratula, (be. ... 1 0 
4. —Light coloured clay, similar to (2). No fossils 
seen ... ... ... ... ... ... 5 0 
5. —Yellowish sandy shale ... ... ... ... 1 0 
The beds have a general inclination to the S.S.W., but it 
is variable in amount. The identity of beds 2 to 5 in this 
section, with 4 to 7 in the one below, is, I think, very evident. 
Section near to Market Harborough Railway 
Station. 
Feet In. 
1. —Soil and Boulder clay ... ... ... ... 2 0 
2. —Brown clay . -... ... ... ... ... 5 0 
3. —Ironstone band, containing concretionary ferru¬ 
ginous nodules, and many fossils ... ... 0 G 
4. —Light blue and brown clay ... ... ... 7 0 
5. — Ironstone band, similar to (3) ... ... 0or8inches 
6. — Clay, similar to (41 .. ... ... ... 3 0 
7. —Yellowish sandy shale, micaceous, and containing: 
Ammonites maryaritatus, Protocardium trun¬ 
cation , Limea acuticosta , cic. ... ... ... 1 0 
8. — Clay, the character of which could not be seen 
owing to water covering it. 
The ironstone bands contained the following fossils :— 
Belemnites, Myacites unioides (Pleuromya costata), 
Pecten cequivalvis , Ostrea cymhium, Astarte 
striato-sulcata, Protocardium truncatum , 
Bhyn chonella tetrahedra, Terebratula (rather 
abundant). 
