Gabbro
Image: Anne Burgess (<a rel="nofollow" class="external free" href="https://www.geograph.org.uk/profile/139">https://www.geograph.org.uk/profile/139</a>) (CC BY-SA 2.0)
Description
The image displays a large outcrop of gabbro, a coarse-grained igneous rock, exhibiting prominent modal layering with alternating bands of lighter and darker minerals, appearing brownish-gray due to weathering.
Geological Context
Gabbro is a coarse-grained, intrusive igneous rock that forms from the slow crystallization of mafic magma deep beneath the Earth's surface in magma chambers. The distinct layering observed in this example is a result of crystal settling, where heavier minerals crystallize and accumulate at the bottom of the magma chamber. This specific occurrence is associated with the Paleogene volcanism of Scotland.
