20 
THE MIDDLE LIAS OF NORTHAMPTONSHIRE. 
Some little distance from the section just described there 
is a clay pit, where the “ Communis ” beds of the Upper Lias 
are worked for brick-making, and some two hundred yards 
north of this is a very fair section of the rock-bed. 
Section at Welton Stone Pit. 
1. —Soil and marly clay, light coloured, containing a 
few small ammonites ... 
2. — Cephalopoda-Led, sandy, light yellowish colour, 
containing very many Ammonites, of the falcifev 
group , and also a fair number of planulate 
o?ies. Ammonites acutus ? Belemnites (many), 
Gasteropods, Astarte, Pentacrinite joints 
3. — Rock-Bed. No very decided break between this 
and bed above. Fee t in. 
Ferruginous sandy bed ... ... 0 10 
Band almost made up of small pebbles 
or concretions ... ... ... 0 
Ferruginous sandy bed, most sandy 
towards bottom ; in places almost 
made up of shells... ... ... 2 
Feet In. 
2 G 
0 8 
6 
6 
- 3 10 
Wiynchonella tetrahedra, Terebratula punctata, 
Ostrea [large], Pecten cequivalvis [large), 
Aviculce, Belemnites [large). 
Shows bedding planes well in places; joints 
numerous, some filled in with lenticular crystals 
of carbonate of lime. 
On the south side of the clay pit another small opening 
showed a section very similar to the above. 
There are also two or three very interesting sections along 
the L. & N. W. Railway between Long Buckby and Crick 
Stations, showing that the Middle Lias is well developed 
there. The first is not far from Watford Village, and is as 
below. 
Section at Watford. 
Upper Idas. 
1. —Lower Cephalopoda-Bed, a rather sandy limestone, 
containing many large Ammonites of the falcifer 
group, and numerous Gasteropods, including 
the rather rare Nerinea liassica 
2. — Shale. Very red in lower part. No fossils 
detected... 
Feet In. 
0 G 
0 2 $ 
