Little Standrop Archives - Geology North https://www.geologynorth.uk/tag/little-standrop/ No vestige of a beginning, - no prospect of an end Sat, 27 Jun 2020 14:50:06 +0000 en-GB hourly 1 https://wordpress.org/?v=6.3 https://www.geologynorth.uk/wp-content/uploads/2022/03/Icon-53x53.jpeg Little Standrop Archives - Geology North https://www.geologynorth.uk/tag/little-standrop/ 32 32 Great Standrop https://www.geologynorth.uk/great-standrop/ Thu, 30 Jul 2015 15:38:30 +0000 http://www.geologynorth.uk/?p=16891 I visit Little and Great Standrop to confirm that these fine tors consist of coarse-grained porphyritic ‘granite’.The rock here is the classic grey type with large white phenocrysts of andesine feldspar. At Great Standrop aplite dykes are apparent cutting through the coarser rock which extends down to the rocky collar ringing the slopes above the … Continue reading Great Standrop →

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]]> I visit Little and Great Standrop to confirm that these fine tors consist of coarse-grained porphyritic ‘granite’.
The rock here is the classic grey type with large white phenocrysts of andesine feldspar. At Great Standrop aplite dykes are apparent cutting through the coarser rock which extends down to the rocky collar ringing the slopes above the Linhope Burn at around NT 944 177. At the foot of the collar, the rock appears to change to the medium-grained pink ‘granite’.
At NT 94590 17775, I find a fine-grained pink rock which I take to be a chilled margin of the pink medium-grained rock against the coarser material of the main Standrop ridge.
The characteristic coarse-grained ‘Standrop’ rock proves difficult to classify. Quartz content is roughly 20%, and in places plagioclase exceeds K-feldspar. The rock lies on the granite/syenite/monzonite/granodiorite boundary.

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]]> Rigg Cairn, High Cantle to High Bleakhope https://www.geologynorth.uk/rigg-cairn-high-cantle-to-high-bleakhope/ Mon, 03 Nov 2014 16:26:03 +0000 http://www.geologynorth.uk/?p=16884 We find a coarse-grained granitic rock at NT 94016 16737. This is pinker with fewer large white plagioclase phenocrysts than the rocks of Hedgehope Hill and Great Standrop but it has a similar grain size. Most of the terrain is trackless peat bog lacking any exposure of bedrock.Descending towards High Bleakhope, the pink medium-grained rock … Continue reading Rigg Cairn, High Cantle to High Bleakhope →

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]]> We find a coarse-grained granitic rock at NT 94016 16737. This is pinker with fewer large white plagioclase phenocrysts than the rocks of Hedgehope Hill and Great Standrop but it has a similar grain size. Most of the terrain is trackless peat bog lacking any exposure of bedrock.
Descending towards High Bleakhope, the pink medium-grained rock outcrops at NT 92469 16365. The outcrops around NT 92643 16262 are all of high colour index and correspond with the dioritic ‘marginal’ variety found on Dunmoor Hill and at Linhope Spout.
In places there are xenoliths of what appear to be hornfelsed andesite.

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