Showing posts with label petrography Geological Survey of Great Britain and Ireland. Show all posts
Showing posts with label petrography Geological Survey of Great Britain and Ireland. Show all posts
Tuesday, 8 September 2015

Eruptive rocks of Brent Tor by Frank Rutley, 1878.

›
Plate VIII.  Basalt with glassy magma mainly devitrified. Brent Tor, North-west side of the foot of the Tor, Magnification x55. The ...
2 comments: