A continuation of the granite of Blisland and St. Breward forms the
north-eastern corner of this parish. A belt then succeeds, which
appears to be of the same kind as the micaceous slate of St. Breward
already described; it may be traced along the side of the Leskeard
road in a disintegrated state. On leaving this road and proceeding
towards the church, the rock becomes more argillaceous, as round
Bodmin, and the land improves in quality. The western and southern
parts of the parish consist of barren downs, reposing on rocks which
abound in quartz.