NS3778 : Old quarry pit

taken 3 years ago, near to Renton, West Dunbartonshire, Great Britain

This is 1 of 10 images, with title Old quarry pit in this square
Old quarry pit
Old quarry pit
The power lines and the dry-stone dyke shown here are depicted on the 1:25000 OS map.

The gorse in the foreground occupies a large hollow, an old quarry pit. The pit is located on the same underlying line of limestone deposits as the much smaller hollow shown in NS3778 : Signs of surface quarrying; the subject of the present picture can be seen in background, right of centre, in that view.

In the satellite map linked from the end-note, large hollow shown in the present picture is indicated by a light blue marker pin, labelled "Quarry Pit 27". See LinkExternal link for a zoomed-in view that is centred on that marker.
Carman Muir: outcrops and old quarry pits
See 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
● Hut circle: LinkExternal link
● Carman (house): LinkExternal link
● Carman (enclosure): LinkExternal link
● Carman (field system): LinkExternal link
Creative Commons Licence [Some Rights Reserved]   © Copyright Lairich Rig and licensed for reuse under this Creative Commons Licence.
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
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1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
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Grid Square
NS3778, 188 images   (more nearby )
Photographer
  (find more nearby)
Date Taken
Thursday, 16 April, 2015   (more nearby)
Submitted
Saturday, 2 May, 2015
Geographical Context
Quarrying, Mining  Derelict, Disused 
Primary Subject of Photo
Pit 
Image Buckets ?
Wideangle 
Subject Location
OSGB36: geotagged! NS 3755 7822 [10m precision]
WGS84: 55:58.1648N 4:36.2693W
Camera Location
OSGB36: geotagged! NS 3754 7822
View Direction
East-southeast (about 112 degrees)
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Image classification(about): Geograph
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