370 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [ Mar. 9, 
At a distance of three-quarters of a mile due W. of Hopping 
Hill, at w, is the very ancient and large “ Old” Duston stone-pit, 
which presents a characteristic section of some 40 feet elevation. 
At the top of the section, at the eastern extremity of the pit, is 
the white sand C, reaching a thickness in some places of 4 feet: 
this thins away, and is absent in the southern portion of the same 
section. At the base of this sand is the plant-bed, with vertical 
perforations, in what is here a slightly ferruginous and very friable 
sandstone. Beneath this are some 12 feet of the variable beds D, 
overlying 4 feet of coarse limestone and slaty beds ; and below, from 
18 to 20 feet of the lower beds, EK, of the Northampton Sand. 
The following are the details of the section as recently exposed :— 
Section of Old Duston Stone-pit, giving Quarrymen’s Terms. 
ft. in. ft. in. 
IL AW ihhitersandly Geleinsss.nosedae cadeaasenes epeenasies sateen eeese -apbies nilto 4 O 
2. Brown soft sandstone, with vertical plant-markings (“ root-perfo- 
rations 7 2)| - 222... Kai aie vs wshaysisnuuelad acans taais SRM oeoaon aces nilto 1 6 
3. “The Roylands”—a series of beds, each from 6 to 9 inches in 
thickness, very variable, sometimes hard, in which condition it 
is “best” building-stone, and sometimes “‘ caly”’ or crumbling. 
These beds occur in two divisions, the building-stone of the upper 
being of a rich red-brown colour, and of the latter of a colder 
fawny-brown colour. Wood is frequently found, and I obtained 
from these beds a slab ripple-marked ; sandy zones also occur, in 
which the tests of shells are perfectly preserved ......... 9 0to 10 O 
4. Orange sand, with rounded cores of arenaceous limestone, the re- 
mains probably of the original bed after being subjected to the 
action of water charged with carbonic acid ..............- d Gatos 2780 
5. “ White Pendle ”’—in two beds :— 
a. Coarsely granulated limestone, made up sometimes of oolitic 
grains in a matrix of calcareous cement, sometimes of erys- 
talline angular particles with comminuted shells, more or less 
arenaceous in places, and containing Belemnites, large Lima 
nov. sp., large Hinnites abjectus, &C.  ....2-.2-2-..+ 2 Oto 3 0 
6. Arenaceous and calcareous slaty beds, very like to, and called 
by the pitmen, ‘“‘ Colleyweston slate” ............... 2 Oto 3 0 
6. “The Yellow ” building-stone—consisting of six or seven beds of 
. varying thickness, in two divisions, differing somewhat in tone of 
colour ; these beds contain “ pot-lids” of ironstone, also Cardium 
COOMOCUTU NEC 28 os ela ss Sm Mees Ae AEE SOAR Ee lae ne Se eseciee GO Oi@ 7 O 
7. “Best Brown Hard” building-stone, in three or four beds—a coarser, 
stronger stone than that of the other beds, but of a rich red- 
brown colour: it contains few fossils ............:.c0eeceeeeeeeee eens 6 0 
8. “ Rough Rag’”’—aslightly calcareous sandstone, green-hearted, hard 
and durable, used for copings, gravestones, and building: it con- 
tains Ammonites Murchisone, A. opalinus, Nautilus, Ceromya ba- 
jociana, Pholadomya fidicula, Cardiwm cognatum, Cucullea, &e., 
and a characteristic zone of Astarte Clegans ..........0.00.eenee vee nees 3 0 
9. “ Hard Blue”—a very hard blue-hearted stone, the surfaces of joints 
and bedding brown from oxidation: it contains the same fossils 
as the last bed, no. 8, excepting Ammonites Murchisone and the 
NSTC AGUS VASE) coricncndsocnso0o2000Kos5 0bc0Daa0cRoGo200e5 3 Oto 4 0 
10. The presence of water prevents the working of the stone in this pit 
to a lower depth; but in an old unused pit in an adjoining field 
the beds for about three feet lower are exposed; and these con- 
sist of cellular ironstone, having sometimes green arenaceous, and 
sometimes ochreous Cores .........-0.s0ss0eeeeee Bid ORS aC BO ERICOD UE SL) 
