NS3678 : Pit on geological dyke

taken 7 years ago, near to Cardross, Argyll And Bute, Great Britain

Pit on geological dyke
Pit on geological dyke
The pit appears to have been the site of some small-scale quarrying. The dyke is described at NS3678 : Course of a geological dyke; the pit itself is, in that view, about 40 metres ahead, and cannot be seen, though the gorse beside it can (as comparison of the two pictures reveals).

The annotated satellite view linked from the end-note includes this geological dyke. See LinkExternal link for a zoomed-in view centred on this area.
Carman Muir: outcrops and old quarry pits :: NS3778

See Link (in a Geograph article) for further information, and LinkExternal link for an annotated satellite view on which various features of geological interest (as well as traces of associated industries and other antiquities) are marked, as described below.

The topography of the parts of Carman Muir to the south of Cardross Road is determined to a large extent by cornstone deposits, which outcrop in places. Cornstone is an impure granular limestone, a fossil soil. Old quarry pits (probably worked before the nineteenth century) and possible test pits can be seen along the lines of these deposits; they are indicated by light blue marker pins on the annotated satellite view, and the cornstone outcrops are marked by orange pins.

This area, lying to the south of Cardross Road, exemplifies what the British Geological Survey refers to as the Kinnesswood Formation (see LinkExternal link at the BGS website for more information); this formation contains cornstone deposits.

Beside and to the north of Cardross Road are outcrops of sandstone rather than cornstone. The sandstone is best seen along a line of outcrops and pits beside the road (these are indicated by reddish marker pins on the annotated satellite view). Another prominent example lies at the ENE end of that line: a large disused red sandstone quarry, the old Fairy Knowe Quarry (later known as Carman Quarry) LinkExternal link at NS36967900. This area beside and to the north of the road exemplifies the Stockiemuir Sandstone Formation (see LinkExternal link at the BGS website for further details).

Both north and south of the road, the strata in this area generally dip at an angle of from 10 to 20 from the horizontal, descending towards the SSE; the Stockiemuir Sandstone Formation that is exposed beside and to the north of the road underlies the cornstone-containing Kinnesswood Formation to the south of the road.

The annotated satellite view also includes markers for various antiquities in the area:

● Ancient cairns: LinkExternal link
● Circular enclosure: LinkExternal link (originally reported as a hut circle)
● Carman (house): LinkExternal link
● Carman (enclosure): LinkExternal link
● Carman (field system): LinkExternal link

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NS3678, 137 images   (more nearby search)
Photographer
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Date Taken
Wednesday, 20 May, 2015   (more nearby)
Submitted
Friday, 22 May, 2015
Geographical Context
Geological interest 
Primary Subject of Photo
Pit 
Subject Location
OSGB36: geotagged! NS 3641 7863 [10m precision]
WGS84: 55:58.3624N 4:37.3789W
Camera Location
OSGB36: geotagged! NS 3642 7863
View Direction
SOUTH (about 180 degrees)
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Geological Dyke 

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