Can somebody give me information on the white rocks with black veins ? Found in Cornwall, England , there were seams of it through the slate rocks on the beach. : r/whatsthisrock

Cornwall shale hi-res stock photography and images - Alamy

Geology of Rocks: Treasures From the Beach and Where They Come

Beach Stones with White Lines & Patterns – Jessica's Nature Blog

Close to where I live (North of Italy) there's a river where I usually

Cornwall shale hi-res stock photography and images - Alamy

File:Chert nodule in chalk (Upper Cretaceous; White Cliffs of

The Rocks Beneath Our Feet: Cornish Hikes for Geologists

Beach Stones with White Lines & Patterns – Jessica's Nature Blog

What are these rocks? A 140 foot deep well was drilled on my land