File:The Quarterly journal of the Geological Society of London (13071337884).jpg

1867..
BFETOX KH^TIC BEDS NEAR &AIXSBOEOUGH.
317
of the Society's Joiirnal, and at Batheaston and Westburj, as de-
scribed by Mr. Moore in
vol. xvii. of the same pub-
lication, forms the base.
At Beer Crowcomb, how-
ever, as described by the
latter, we find a pale-blue
stone, 1 foot 2 inches thick,
with vegetable -like mark-
ings, followed by blue shaly
marl, given as the lowest
bed of the series, which may
be taken as the equivalent
of the lowest Gainsborough
bed; and perhaps at the
well-known Aust Cliff lo-
cality, where the bone-bed
is described by Dr. Wright
as lying abruptly on the
Keuper, the stratum of pale
arenaceous marl, 1 foot in
thickness, which, though
placed by him on the top
of the Keuper, in tex-
ture apparently resembles
the lowest Ehsetic bed of
Gainsborough, may be an-
other of its equivalents.
This, however, I hazard
only as a conjecture, and
on the slight supposition
that the fossils of the Ehaetic
type, should it contain any,
are so few as to have hi-
therto escaped observation.
Following the line in a
southerly or south-easterly
course towards Lincola,
which coincides with the
direction of the dip, we
find in corresponding order
the various beds of the
series laid bare, the next of
which, No. 2 in the section,
consists of a stratum of
black fissile shale, 8 feet in
thickness, containing nests
of pyrites, and having se-
veral thin, non-continuous
veins of grey pyritous stone imbedded in it.
Keupti flails
The main bulk of this