Ribbon Banded Mudstone (Shale)
£1.00 – £2.74
Ribbon banded mudstone, Silurian in age, collected from the Denbigh grits in Wales, UK. Available in various sizes.
This so called Ribbon Banded Mudstone is Silurian in age & specifically from the Nantglyn Flag Group of the Denbigh Grit Formation of N. Wales. The largely grey rock shows alternating bands of fossiliferous mudstone and laminated muddy siltstone with subordinate thin pale green to yellowish lenticular bands of calcareous siltstones. Each specimen is supplied in a labelled card tray.