This landscape was 430 million years in the making – learn about how the rocks were formed and how to identify them.
To enrol, call Andrew on 0785 515 4596.
Carningli – once molten rock that welled up deep under a mountain range as high as the Himalayas, since washed away to leave the hills we see now.
Old red sandstone near Dale, once iron-rich sand dunes, since compressed under hundreds of metres of rock, before being revealed again by erosion.
Vertical strata near Castlemartin, cut flat by the waves.
Quartz veins form in cracks deep underground when superheated water dissolves the silica in the rocks. When it eventually cools, the silica crystallizes in the cracks.
The folded bands of rock at Pen-yr-Afr tell a story of many eras of mountains built and then washed down to the sea in layers gradually compressed under their own weight over 430 million years ago; folded into huge mountains by colliding continents 20 million years later; which have since been worn down by rain, ice and wind.
Mwnt – where a dip in the bedrock (between the mound and this side of the cliffs) has been filled by rubble dumped by a glacier, only 12,000 years ago.
Join us to hear more of this story. Andrew’s sessions are always full of enthusiasm and wide-ranging discussion. No question is too basic!