#DogWalkingGeology this cold-water carbonate beach sediment on Eilean Dubh na Ciste would make a fabulous limestone given the right geological chances (very slim alas 😁). Lots of maerl (calcareous algae), crab claws, cowries, periwinkles,limpets, echinoid plates, and many more 😊 #Mull#Geology#Biology#sedimentology