Raisby Hill Quarry

Also within

Durham County

Condition (Natural England)

Geology & landscape

Mining / Industrial: Quarry · Geological Period: Permian · Rock Type: Dolomite, Limestone, Slate

Description

Area, 52.42 ha. 129.53 ac. Description This working quarry exposes a section through the Ford and Raisby Formations and the Marl Slate of the Upper Permian. The site is of particular importance for displaying the type section of the Raisby Formation the carbonate unit of the first sub cycle of cycle 1 of the English Zechstein sequence in N E England E Z1 Cala. It is also of interest in that the rock is predominantly limestone rather than the usual dolomite and that it contains rather a fuller and more diverse fauna than usual. A key section in the Marine Permian of N E England. Other Information 1. During the 1990/ 91 revision, the boundary has been modified by extensions and deletion and excludes part of the land previously notified under Section 23 of the National Parks and Access to the Countryside Act 1949. 2. Raisby Hill Quarry SSSI formerly included most of Raisby Hill grassland SSSI, which was notified as a separate site in 1984 under Section 28 of the Wildlife and Countryside Act 1981 as amended.3. The site has been identified as of national importance in the Geological Conservation Review.* Under Section 23 of the National Parks and Access to the Countryside Act, 1949.