Cymraeg

Historic Landscape Characterisation

Mawddach - Area 21 Gallt Ffynnon yr Hydd (PRN 18351)

 

 

Historic background

The small enclosures shown on the 1839 Llangelynnin tithe map are much as they exist today. The stretch of railway which runs along the base of the cliffs here was the final stretch of the Cambrian Railway to be completed (technically it was the most difficult feat of engineering) in 1867.

Key historic landscape characteristics

Railway, drystone walls

An 11 kilometre-long coastal stretch from a point south of Morfa Mawddach (area 10) which takes in parts of Gallt Ffynnon yr Hydd (area 21), the coastal stretch to the south (area 13) and Llwyngwril (area 22) was designated a SSSI (CCW ref. SSSI Glannau Tonfanau i Friog' 31 WVV) in 1999. It was designated for both its geological and marine biological interest. The north-west facing shore is backed by high rocky cliffs (area 21) while the majority of the coastline is made up of eroding, soft, sedimentary cliffs. It is important for its structural geological and mineralogical features which provide important evidence regarding the age of the Dolgellau Gold Belt. The cliffs and intertidal zone are composed of folded and faulted, south-east dipping sedimentary rocks which range in age from Middle Cambrian to Lower Ordovician. They consist of interceded mudstones, siltstones and sandstones and are located at the south-west end of the Dolgellau Gold Belt and which display Cambrian rocks which have a geochemical signature characteristic of the veins within the Gold Belt further north.

 

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