Anglesey's Cambrian Ordovician and Silurian Rocks
Anglesey photos from October: Anglesey's Cambrian Ordovician and Silurian Rocks: Anglesey contains a large area of Ordovician rocks but only smaller tracts of Silurian strata. The Ordovician were not defined until 1879 when Charles Lapworth recognised the geological overlap between the Cambrian and Silurian rocks and named it after an Iron Age tribe, the Ordovices from northwestern Wales. The Ordovician ‘appropriated’ rocks from the upper part of Sedgwick’s Cambrian and the lower part of Murchison’s Silurian. Anglesey’s Ordovician rocks were deposited on the margins of a marine basin, which escaped the intense volcanic activity prominent elsewhere in Wales, particularly in neighbouring Snowdonia. Anglesey contains a large area of Ordovician rocks but only smaller tracts of Silurian strata.
I don’t pretend to understand half of all that but put it here, from the internet, as information for anyone who does. All I thought was what amazing rocks, they were part of a wall, not all the wall just the last part, so must have been brought here to Holyhead for this purpose, I don’t know where from but would love to know so I could go and look.
Anglesey's Cambrian Ordovician and Silurian Rocks
Anglesey photos from October: Anglesey's Cambrian Ordovician and Silurian Rocks: Anglesey contains a large area of Ordovician rocks but only smaller tracts of Silurian strata. The Ordovician were not defined until 1879 when Charles Lapworth recognised the geological overlap between the Cambrian and Silurian rocks and named it after an Iron Age tribe, the Ordovices from northwestern Wales. The Ordovician ‘appropriated’ rocks from the upper part of Sedgwick’s Cambrian and the lower part of Murchison’s Silurian. Anglesey’s Ordovician rocks were deposited on the margins of a marine basin, which escaped the intense volcanic activity prominent elsewhere in Wales, particularly in neighbouring Snowdonia. Anglesey contains a large area of Ordovician rocks but only smaller tracts of Silurian strata.
I don’t pretend to understand half of all that but put it here, from the internet, as information for anyone who does. All I thought was what amazing rocks, they were part of a wall, not all the wall just the last part, so must have been brought here to Holyhead for this purpose, I don’t know where from but would love to know so I could go and look.