Some 400 million years ago a fundamental
change took place which had a profound effect in shaping the
geology of Wales. For a period of at least 200 million years before
this much of Wales was covered by sea, and the thick deposits of
mud and sands which accumulated in this environment were
consolidated to form rock which was eventually uplifted by Earth
movements to stand above the sea as dry land. In broad terms, the
Werbongam site demonstrates the change from sediments which are
predominantly of marine origin to strata which were deposited in a
freshwater environment. In other parts of Wales, this change was
apparently accompanied by great upheavals in the Earth's crust, but
this was not the case in the Werbongam area, where there was a
gradual change from marine to a non-marine type of sedimentation.
Werbongam is therefore of critical importance in the understanding
and interpretation of this important event.
Managing this site
The site is under the ownership of Carmarthenshire County
Council. The special features of this SSSI and CCW’s views about
site management have been summarised in a Site Management
Statement, addressed to the owners and managers of the land. The
statement can be found in the resource section below.
There is no public access to this site.
Werbongam means ‘alder (grove) having a crooked end or base’
with Wer probably meaning gwern ‘alder-grove’ and bongam ‘having a
crooked end or base’.