 The term 'Carnmenellis Granite' refers to the plateau of high ground in this area, one of five granite plutons in Cornwall that make up part of the Cornubian batholith (see also Geology of Cornwall).Carnmenellis was also the name of a former ecclesiastical parish created in 1846 from part of Wendron parish.Initially, the parish included the area which later became the parish of Pencoys.