St David`s Head
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

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