Geology - Pembrokeshire
'En Echelon' tension gashes / 1
View from Horseneck over an Old Red Sandstone rock face on Albion Sands -
nr Marloes Beach , showing En Echelon tension gashes.
'En Echelon' refers to closely-spaced, parallel or subparallel, overlapping or step-like
minor structural features in a rock.
The rock has been sheared and the resulting tension gashes are subsequently
filled by precipitation of a mineral, quartz in this case ,or typically calcite.
Ref: 11015
Date: 26/10/2012
Location: SM 772.076
