4.1 - WHITESANDS - ABEREIDDY
St David`s Head
View passed glacial erratics from the last ice age above Porthmelgan ,
to St David`s Head .
St David's Head and the coast to the east (Penllechwen )
is composed of "Gabbro" and other closely related rocks .
"Gabbro" formed when volcanic magma intruded into the Ordovician sedimentary rocks.
The thermal contact also produced new metamorphic minerals in the sedimentary rocks ,
mainly "Garnet" and "Cordierite".
Ref: 7837
Date: 07/11/2010
Location: SM 728 279
