The Norber erratics are Silurian grit/Greywacke boulders placed on Carboniferous Limestone pavement, deposited by ice ~15kya ago, at the end of the Devensian glaciation. These erratics are a classic site for studying glacial deposition processes and limestone denudation rates.
Goldie, H. (2005). Erratic judgements: re-evaluating solutional erosion rates of limestones using erratic-pedestal sites, including Norber, Yorkshire. Area, 37(4), pp.433-442.
The virtual outcrop was generated using Agisoft Photoscan from photographs acquired by Ross Langley.