Old Cumbria Gazetteer - waterfall, Sinen Gill


included in:-	geological walk, Blease Fell
	waterfall, Sinen Gill
site name:-	Sinen Gill
site name:-	Blease Fell
civil parish:-	Threlkeld (formerly Cumberland)
county:-	Cumbria
locality type:-	geological site
locality type:-	river
locality type:-	waterfall
coordinates:-	NY30032814
1Km square:-	NY3028
10Km square:-	NY32
SummaryText:-	The fall exposes a Skiddaw Granite intrusion.

	BPR40.jpg (taken 26.9.2008) BPR41.jpg Skiddaw granite rock. (taken 26.9.2008)
	The Sinen Gill exposes the Skiddaw Granite intrusion north of Blease Fell.
	Higher up is a wall of harder rocks, the hornfels at the other side of the intrusion.
	NB: beware my amateur geological knowledge.

	JandMN : 394 BXO35.jpg Rock, hand specimen of granite, from the exposure in Sinen Gill, Blease Fell, Threlkeld, Cumberland, NY30042814, 21 October 2012. The specimen was taken from the stream bed below the waterfall over the exposed granite. Ordovician or Lower Devonian. The grey crystals are quartz; silcon dioxide, Si02. The white crystals are feldspars; sodium aluminium silicate, NaAlSi3O8, or potassium aluminium silicate, KAlSi3O8, or calcium aluminium silicate, CaAl2Si2O3. The black crystals are biotie or hornblende, complicated lattice silicates. (taken 21.10.2012)

	JandMN : 393 BXO34.jpg Rock, hand specimen of Skiddaw mudstone highly metamorphosed to hornfels, from Sinen Gill, Blease Fell, Threlkeld, Cumberland, NY30042814, 21 October 2012. The specimen was taken from the stream bed below the waterfall over the exposed Skiddaw granite; contact metamorphism? it 'rings'. Skiddaw group, mudstone; Ordovician, Llanvirn/Arenig. (taken 21.10.2012)

	BPR42.jpg Skiddaw granite rock; white crystals are feldspar, grey are quartz, black are biotite or hornblende. (taken 26.9.2008)

	BXN80.jpg (taken 21.10.2012) BXN81.jpg (taken 21.10.2012) BXN82.jpg (taken 21.10.2012)

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