Hobbs Quarry (grid reference ST622446) is a 0.5 hectare geological Site of Special Scientific Interest near Shepton Mallet on the Mendip Hills in Somerset, notified in 1984. This disused quarry, which now forms the back of a builders merchants yard, is a Geological Conservation Review Site which demonstrates early Jurassic transgression, with steeply-dipping Carboniferous Limestone being overlain by flatter-lying massive limestones (of early Jurassic age) known as the Downside Stone.