TRANSACTlOxa OF TTIE SECTIONS. 
rod.is only a small portion occurs overlying the oolitic beds at tlie entrance to 
W»^ni tunnel and at the wood-pit near there. ... 
Tbf coarse pisolitic rock is interesting, inasmuch as it varies in its condition ^d 
ce«p«lness, as well as its fossil contents in different localities; at KetUm it w a 
oiffK rock composed of rolled fragments of shell*, corals and echini with oolitic 
r.*t!s, »trv friable and readily decomposing, tlic term “ crash” being there applictl 
L ii ; at V^’ansford tunnel it presents the same fnable character, but contains mure 
anVet specimens of testacea. as oumerons Ceritliia, Eulima, Ncriniea and roanf 
may be detected in some portions. AtCbapcI Hill the Ba.mc b«l becomes 
I iw* pijolitic crystalline rock, with many shells allied to Phasianeila and 
«*»TnB |5 the surface of the blocks. At Barnack this bed is also a compact pisolitic 
iHi faU of numerous minute shells, frequently in a good stale of preservation, u 
Troehtu, Turritella, and many small plicated and smooth TerebraluUf. 
4 Dd the subjacent one hare long been cclebraled as a durable budding 
, ami Qflder the name of Barnack rug have from a very early jitriod been ex- 
‘“'•'dy quarried in this neighbourhood. The numerous churches and other build* 
tJMtrurtfd of this material, attest its durability as well as the antiquity of the 
^ns. The followiug buildings are among the principal for which it was uaed, 
tliiBches of Stamford, Bainack, Uffortl, Bainton, Market Deeping. Spalding, 
&Vj.ni 4 lao Rurghlcy House and Peterborough Cathiulral. The pillars how c’.er of 
ttthairal were made from the Allcrton marble (as it is called) not far distant, 
{fob^ly belonging to the Forest marble. 
Any details respecting the Ketton fn-catoncs are unnecessary, as they have long 
mown Md extensively used, and like those of Bath and elsewhere, become 
ti^ilmbly indorated by exposure. 
>»< lower series of these beds (great oolite) consist of cream-coloured marly lirne- 
Containing zones of shells, of wbicli the A’i*ri»f*a ringenda anil other specia, 
* Mndiolii jAicala, are abundant, with patches of fragments ef 
yiolypodioides) and ntber plants {Zamilfi'jt not occurring in regular 
these are beds of sand and sand-rock, underlaid by compact crystal- 
with Nerlnsa and fiagmctUa of ferns 5 below this i» a coocti- 
of sand with irreguloi- cylindrical ramose bodies of sandstune, resembling 
’'doming Bomeiimes a very singular arrangement, as at Wittering j to 
, ™*'^''‘‘o-silieenua beds, gray and brown, separating oAvr expisure 
*> as atCullywestou and Easton; and sometimes these beds ron- 
varying in size, of a tlattencd spherical form *, rwicroliling 
of Stonesfield, and like them split, not concentrically, but 
1 'a‘Uiw if* somewhat in their fissile character in this district, 
*• f- fragments of plants, espreially 
’■ - littering; but these localities do not appear to uboimd in that 
!! r”*'* the remmns of mammalia, saurians and fishes, for 
Stonesfield are so celebrated. Fuller details of the miiiefal 
b.-' ir A different beds, of which the above is but a general outline, will be 
B™”- 
Hi •»,* Ti .'f appears to be generullv absent, although slight Uhcps of a 
flfwiw ^ Stamford, hilt few indications appear elsewhere. 
^., *^ 5 ®ti 8 istingof ferruginous sand and sand-rock, containing casts 
• »v* not in tlie immediate vicinity of Stamford attain 
to is L!!®®*’, but its relative inferior position to the slaty beds nre%-iously 
^ osar Bl«h • localities, as in the section exhibited at 
i’^"«'‘on of these bed.s may also be observed in the 
F«»t 0 ^ where the ferrugioous beds are seen dipping beneath 
U«», The I inclination being du« to a slight disturbance that has affected 
“I®” h® seen overlying the inferior beds at the railway 
'^ianctioB ufrt f ^‘’P* Morcut and Manton tunnels, where 
^ limited '^wroginous beds witli the upper lias may also be traced. 
, _ regards thickness of the inferior oolite, the absence of the 
* (jf 
^ •tful ‘I’Sse spherical flaes are divided in half, and form an excellent 
•“* Co«y»S, 
‘ me > 0,1 worked for a considerable period, as we find them 
1S17. "'”^''f”«’’ryV]!.asthe 8 lateimnes. 
