Felsite Intrusion
Introduction
The photograph on this page of Felsite Intrusion by Ashley Dace as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Felsite Intrusion
Image: © Ashley Dace Taken: 8 Apr 2011
This looks like sandstone at first due to its colour, it even has 'ripple marks'. However why would this block of sandstone survive and the rest not. The answer is solved when looking at a fresh face through a hand lens. Small crystals can be seen. This is in fact a felsite, the same as the QFP in the area but without the phenocrysts. The 'ripple marks' are most likely flow banding remains.
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
55.502765
Longitude
-5.33968