a 
PALOZOIC ROCKS BENEATH NORTHAMPTON, 493 
boniferous period, was an exposed land-surface, over which the 
much-desired Coal-measures were not deposited. This boring is 
another proof that it is improbable that the Coal-beds occur in 
North Northamptonshire. 
The succession of the beds below the Lias was as follows :— 
No. of bed. ft. in. 1 ft. a: 
BAUGIACE SOU. a5. sins neinaprcingetertoahsre aude te aent adore ncaa en eat 10 O 
Liassic series. Upper, Middle, and Lower............... 656 0 666 0 
1. Junction bed between clay and limestone below ...... 6 
2. White-Lias limestone, with fissures containing large 
erystals of calc-spar and pyrites, 4 inch cube ...... 36 670 0 
SMA OM CTA ph vaiwacibacidca-: uceas = Nae wehodhehtadatemaceee 3 ; 
BEUMiite SANGY UIMEStONE ob a ce ccnp acioe sarees «anes «dates 6 9 
5. At the base of bed 4a conglomerate of small rounded 
fragments of quartz-andesite ?, thicker on the lower 
part, more scattered towards the top ............... 13 
BRU SIO hde seein tain othe Moat cisiaaists Sachsen aaedcae mole naeaeee 6 
fepeondcor oreyish sandy Marl! o..c..05. 2. ce-nieenenssieenenes ey 
8. Green shale, with light and dark shaded bands ...... 76 688 0 
Base OTeY SANGStOMS 2.0.0.0... ec ecreneeneeccnececeane a 240 7120 
areereceia of GQuartz-felsite .. 60.0. liceeee sce eses ee sseees 3) 0) (li) 
11. Quartz-felsite, with eroded surface, proved to......... 740 789 0 
The largest cores in this boring measured 74 inches in diameter ; 
the size was reduced four times, the last core measuring 23 inches. 
The boring was commenced in October 1883 and completed in 
March 1884. 
V. GrnERAL Conctusions. 
These borings furnish us with additional evidence for determining 
the extension eastwards of the Paleeozoic rocks beneath the Meso- 
zoic formations, and verify to some extent the conclusions drawn 
from the borings in the London and Oxford areas. If the beds met 
with at Gayton are taken as the Old Red, that locality is now the 
northern boundary of that series, which it was predicted * would 
probably be found to strike across England, and the most easterly 
extension of which has been determined at the borings in the London 
area. 
The Carboniferous Limestone at Northampton may now be con- 
sidered its most easterly underground extension known in England ¢ 
if we disregard the reported discovery of that series at Harwich, 
and is in all probability an extension of the Penine chain, the 
axis of which is continuous as far as Nottingham, where it dips 
beneath the Secondary formations, and though not yet discovered 
in the London area, it may yet be found to the west. 
The Trias was only revealed in the Gayton boring of the North- 
* R. Godwin-Austen, Quart. Journ. Geol. Soe. vol. xii. 
t Etheridge, Quart. Journ. Geol. Soc. vol. xxxvii. p. 231. 
Q.J.G.8. No. 159. 21 
