Granite - Shap
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Fact sheet
Description: 

The Shap granite, a distinctive coarse-grained granite with large pink orthoclase feldspar, was intruded late in the Caledonian orogeny around 394 million years ago. The granite had a complex evolution involving multi-stage addition of basaltic magma to the magma chamber and assimilation of country rock. Much of the magmatic history is recorded in the compositional variations of the feldspar megacrysts. This rock has been widely used as a decorative building stone and our sample was collected from the Shap granite quarry some years ago before the quarry became a geological conservation area where collecting is no longer allowed.

The mineralogy of this granite is relatively simple - biotite, quartz and two feldspars (plagioclase and K-feldspar). Fluorapatite, ilmenite and titanite are also present in minor amounts. The large pink Carlsbad-twinned K-feldspar megacrysts dominate the thin section.

In Place
In Time
infoImage: 
Location description: 
Shap Pink quarry, Shap Fell, Cumbria
Accuracy:
Location precision: 
Good
Timescale:
Timescale: 
Devonian
Ma = Millions of years ago
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Type: 
igneous
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