Arisaig May 22 - Friday. Started out east to see the basal Silurian beds. In Rory McDonalds brool one saw the Beckhill formation resting on the Arthosylite. Here it is a fine grained sometimes with several zones of arenaceous limestone and one of them have fossils in abundance but of few species. Stripes of the formation go on once into shales and others come into the Ross Brook shale. This fossiliferous zone is about 10 feet thick and forms the bulk of the Beckhill formation. The reason why it is sandy here is because it is adjacent to an island of opthylite that in long gone down into sand giving into the regolation muds. These beds stand vertical. We then went further east to Becks Hill Cove. Here on the eastern side of the cove the Beckhill shale formation again stands up and due to a erosion of the flood district. The formation is a fine sandy, arenaceous shale with very few fossils.