Designations: GCR (No: 420), SSSI
Long Quarry is unique in displaying development, growth and form of a stromatoporoid reef.
GCR block / key theme: Marine Devonian
Associated SSSI: Hope's Nose to Walls Hill SSSI
GCR Statement of Interest: "The Long Quarry area includes the type section of the Devonian Walls Hill Limestone. The best exposure of this stromatoporoid-rich unit can be seen here in the quarry floor. The steep dip of the beds allows an easy bed by bed examination to be made. Within the formation it is possible to recognise four distinct subfacies not seen elsewhere in the Torquay Limestone. The site is unique in so well displaying the development, growth and form of a stromatoporoid reef."