| | Natural England - Special Sites |
 | | The Mendips are formed in blocks of folded Carboniferous Limestone, and represent the remnants of a much higher range of hills that existed hundreds of millions years ago. |
 | | In the Mendips, the distinction between the rough grassland and heathland vegetation of the sandstone outcrops and the vegetation of the surrounding Carboniferous Limestone plateau is readily apparent. |
 | | Throughout the Mendips, on slopes the Carboniferous Limestone gives rise to thin calcareous soils, some of which support limestone grassland, but deeper soils, particularly on the main plateau surface, have weathered to become acidic in their upper layer and support a rare vegetation type known as limestone heath. |
| www.english-nature.org.uk /special/geological/sites/area_ID30.asp (3129 words) |