This is cut out beneath the overlying Upper Trigonia Grit (across the common and to the south).

In research terms this shows the effects of earth movements on the local succession.

[1] The grassland plateau supports tor-grass, upright brome, sheep's fescue and quaking grass.

Herbs recorded include chalk milkwort, clustered bellflower, kidney vetch and autumn gentian.

[1] Invertebrates flourish on this site and butterflies recorded include the Duke of Burgundy and marsh fritillary.

[1] In 2019 a project to reintroduce the endangered Large blue to the common was undertaken with an estimated 750 butterflies emerging in the summer of 2020.