Explosion Breccia - Wheal Remfry (#12)
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Fact sheet
Description: 

The Wheal Remfry china clay pit lies at the western end of the St Austell granite complex.The clay pit yields white clay suitable for use in the ceramic industry rather than the more refined clays used in paper making. This explosion breccia provides evidence of the enormous pressures that can build up in trapped hydrothermal fluids. This rock mainly consists of fragments of sediment brought up from depth by the high pressure fluids.

In thin section the rock is dominated by fine-grained bands of tourmaline and quartz that have replaced the original detrital minerals of the sediment. At this scale, the rock consists of a series of fragments welded together and metasomatised by the fluids.

In Place
In Time
Location description: 
Wheal Remfry china clay pit, St Austell, Cornwall
Accuracy:
Location precision: 
Good
Timescale:
Timescale: 
Permian
Ma = Millions of years ago
In Focus
Collection:
What\
Type:
Type: 
igneous
What\
Rock-forming minerals:

Rock forming mineral:

What\