NJ5866 : Sillimanite

taken 3 years ago, near to Portsoy, Aberdeenshire, Great Britain

Sillimanite
Sillimanite
The tiny pale-coloured laths are a mineral called sillimanite. This is of great interest to geologists because it is one of a trio of polymorphs of aluminium silicate. What this means is that they take on different forms depending on the temperature and pressure to which they were subjected during metamorphism. This in turn reveals how deep down in the crust the rocks were when the minerals formed. The pencil serves as both a pointer and a scale.
Creative Commons Licence [Some Rights Reserved]   © Copyright Anne Burgess 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
NJ5866, 140 images   (more nearby )
Photographer
  (find more nearby)
Date Taken
Saturday, 13 September, 2014   (more nearby)
Submitted
Sunday, 21 September, 2014
Geographical Context
Geological interest 
Subject Location
OSGB36: geotagged! NJ 5848 6650 [10m precision]
WGS84: 57:41.1848N 2:41.8801W
Camera Location
OSGB36: geotagged! NJ 5848 6650
View Direction
EAST (about 90 degrees)
Looking for a postcode? Try this pageExternal link
Clickable map
+


Image classification(about): Supplemental image
This page has been viewed about 15 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