SW9257 : Wheal Remfry Breccia

taken 4 years ago, near to Fraddon, Cornwall, Great Britain

Wheal Remfry Breccia
Wheal Remfry Breccia
Apologies for the off site picture, no camera on the day. This is a chunk of the Wheal Remfry breccia taken from the operating pit (with an organised party). An accumulation of borosilicate fluid/vapour in the roof of the crystallising granite lead to an increase in fluid pressure. Eventually the fluid utilised a fault or weakness to the surface resulting in an explosive decompression. The following collapse lead to a breccia consisting of angular killas clasts (country rock) and milled granite in a fine grained tourmalinite ground mass. The ratio of granite and killas varies; some samples seen were mostly killas, indicating the location was close to the granite/killas contact. The rock is removed for aggregate by Aggregate Industries in partnership with Imerys who benefit from the secondary aggregate tax break.

Quite a bit of important geology but a pain to the pit manager!
Creative Commons Licence [Some Rights Reserved]   © Copyright Ashley Dace and licensed for reuse under this Creative Commons Licence.
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
+
1:50,000 Modern Day Landranger(TM) Map © Crown Copyright
TIP: Click the map for Large scale mapping
Change to interactive Map >
Grid Square
SW9257, 6 images   (more nearby )
Photographer
  (find more nearby)
Date Taken
Friday, 4 October, 2013   (more nearby)
Submitted
Friday, 4 October, 2013
Geographical Context
Geological interest 
Subject Location
OSGB36: geotagged! SW 9232 5763 [10m precision]
WGS84: 50:22.9082N 4:55.3527W
Looking for a postcode? Try this pageExternal link
Clickable map
+


Image classification(about): Supplemental image
This page has been viewed about 107 times.
View this location: KML (Google Earth) · Google MapsExternal link · Bing MapsExternal link · OS Map Checksheet · Geograph Map · geotagged! More Links for this image
NW N NE
W Go E
SW S SE
[Mark
You are not logged in login | register