File:The Quarterly journal of the Geological Society of London (13860441394).jpg

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638 PJK0E. C. LAPWORTH ON THE GIRVAtf SUCCESSION-.
1. Shalloch Forge. — At the back of the blacksmith's shop of
Shalloch, where the Braehill fault comes upon the sea-shore, we find
excellent exposures of the strata of this conspicuous protecting
series. The general succession there apparent is given in the following
section (fig. 26).
Fig. 26.— Section of the Rods of Shulloch Forge.
B. Arc! mil Ian Series

—
Be. Barren flagstones.
C. Newlands Series

—


Cba. Woodland beds.
Cba 1 . Coarse green boulder-conglomerate of Craigskelly.
Cba~. Coralline limestone, with Pentamems oblongus &c.
Oba 8 . Striped shales, with -Diplograptus onodestus, Monograptus
leptofheca, &c.
Cc. Saugh-Hill beds.
Cc 1 . Quartz conglomerate of Shalloch Forge.
ff. Faults.
The beds which have the appearance of being lowest in the succes-
sion are certain green flagstones and shales (Be), lithologically similar
to those of the Barren Flagstones of the Ardmillan group and the
green flagstones occasionally found in the Graptolitiferous zones of
the Saugh-Hill beds. They are only seen at low water, imme-
diately to the south of the rugged boss of the Horse Rock, which at
high tide forms the most northerly of the protecting fringe of islands
already referred to. Of these green flagstones only about 30 feet
are seen, and they dip at an angle of about 45 degrees to the north-
ward, and are succeeded, with a slight unconformity, by the remark-
able mass of boulder conglomerate of which the Horse Rock itself
is made up. This conglomerate is from 50 to 60 feet in total thick-
ness, and contains many interbedded seams of gritstones, which show
that the general inclination of the rock is almost identical with that
of the flagstones below. The main mass of the conglomerate is
made up of well-rounded boulders varying from one inch to a foot
and a half in diameter. They consist of pieces of granite, porphyry,
fclstone, greywacke, shale, Lydian stone, quartz, and jasper, imbedded
in a coarse sandy matrix of a dark green colour and excessively
indurated. In its general aspect the rock reminds us of the Benan
Conglomerate, and also in the special association of its enclosed
boulders, but it is altogether harder and much more firmly com-
pacted than is generally the case with that deposit.
Above this Horse-Rock conglomerate there is a break in

the
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Source https://www.flickr.com/photos/biodivlibrary/13860441394
Author Geological Society of London
Full title
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The Quarterly journal of the Geological Society of London.
Page ID
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36936467
Item ID
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113692 (Find related Wikimedia Commons images)
Title ID
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51125
Page numbers
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Page 638
Names
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NameFound:Diplograptus NameConfirmed:Diplograptus EOLID:4724632 NameBankID:4145310 NameFound:Monograptus NameConfirmed:Monograptus EOLID:4724831 NameBankID:4247149
BHL Page URL
InfoField
https://www.biodiversitylibrary.org/page/36936467
Page type
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 38 (1882).
Flickr tags
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Flickr posted date
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15 April 2014
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This file comes from the Biodiversity Heritage Library.

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current06:59, 26 August 2015Thumbnail for version as of 06:59, 26 August 20151,245 × 2,068 (459 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/13860441394 | description = 638 PJK0E. C. LAPWORTH ON THE GIRVAtf SUCCESSION-. <br> 1. Shal...

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