ice-table

From the top of the cliff the surface slopes downwards for about two miles into the interior, like the half-raised chest-lid of my illustration sloping towards the hinges, or the uptilted ice-table of the boulder sloping towards the centre of the pond; and the depression behind forms a flat moory valley, full fifteen miles in length, occupied by a chain of dark bogs and treeless lochans.

The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Hugh Miller 1829