HRS 4248 Carboniferous, Millstone grits, Fletcher Bank Quarry, Anglezarke 1969
The massive Millstone grit rocks known as the Fletcher Bank Grits are overlain by shales with thin seams of sandstone. BGS Fletcher Bank Grit - Sandstone. Sedimentary Bedrock formed approximately 314 to 315 million years ago in the Carboniferous Period. Local environment previously dominated by rivers.
