(ES Pr yee ee 
89 
The main feature of this section is the two distinct marls 
at the north end uniting at the south end, as the compact free- 
stone parting thins out. 
Here the line is carried over the Calmsden Valley by a 
high embankment, sixty- one feet from the rail to the bottom of 
the hollow. 
The next cutting is a few hundred yards south of the Foss 
Cross Station, and may be called the 
ALDGROVE CUTTING. 
Kh 
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77) 
_ Rubbly Oolite a oa fee Mi se ah BAe bec 
Thin sandy marl ... 
Fissile planking bed : ap 2 as 
Hard bed, perforated by numerous seiesecia cavities 
Grey compact freestone, apparently without any corals 
Second hard bed, with numerous cavities 
Grey compact freestone, same as 5 
Marl 
Corse Stare to" bs See 
wn Re oO 
SaRMRSCRAASBaS 
We note here that there exist two distinct bands of the 
beds I term “ perforated,” the lowermost thins out to the N. 
end of this cutting to one half its original thickness. 
These so-called ‘‘ perforated ” beds have furnished a subject 
of much controversy and debate among local geologists, and it 
is admitted that they furnish the ornamental stone called 
Dagham stone. I confine myself here to recording the fact 
that there are several of them, and that they occupy different 
horizons in the Great Oolite, but I abstain from discussing 
their composition or possible origin. At one time I was aware 
of only one such bed, and I used it as an index to the position 
of the beds above and below it; but that idea is exploded by 
the sections now exposed, as well in this as in succeeding 
exposures. 
In this cena in bed No. 7, there has been found a 
remarkable organism, which I will only briefly allude to, as it 
has not yet been thoroughly worked out. I have secured a fair 
number of specimens. It occurs in spheroidal masses about 
the size of a cricket ball, and is madé up of concentric shells, 
