 A high degree of faulting complicates the geology of the May Hill area, causing outcrops of Wenlock limestone and Downton Castle Sandstone on its flanks, as well as a possibly Precambrian section of the core of the hill exposed at Huntley quarry.The hilltop is of Llandovery age May Hill Sandstone.To the east is the wide fertile Severn Vale, floored by Triassic 'New Red' sandstones and marls of the Mercia Mudstone Group (formerly known as the 'Keuper Marls'), and Jurassic lias clays further east.