Westward Ho! Member
['Some aspects of the sedimentology of the shale grit and grindslow shales', 'Roger G. Walker', 'Westward Ho! Member', 'Some aspects of the sedimentology of the shale grit and grindslow shales (Namurian R1c, Derbyshire) and the Westward Ho! and Northam formations (Westphalian, North Devon)']