4.5 - STRUMBLE HEAD - GOODWICK
Pen Anglas - Dolerite Columnar Jointing - 1
Dolerite Columnar Jointing, on NE face of Pen Anglas headland .
The inclined rock face at Pen Anglas shows the Cooling Joints of the Dolerite columns.
Dolerite is a subvolcanic rock with larger crystals than a similar in composition rock - volcanic Basalt.
Other famous places showings Columnar Jointing in Basalt include the Giant's Causeway in Northern Ireland
and Fingal's Cave on the island of Staffa, Scotland .
Ref: 2930
Date: 08/05/2008
Location: SM 949 405
