Hartcliff Rocks Quarry

Infobox SSSI


name=Hartcliff Rocks Quarry
aos=Avon
interest=Geological
gridref=ST534662
area=1.6 hectare (3.9 acre)
notifydate=1991

http://www.natureonthemap.org.uk/map.aspx?
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Hartcliff Rocks Quarry (gbmapping|ST534662) is a 1.6 hectare (3.9 acre) Site of Special Scientific Interest (SSSI) near Felton, Somerset notified in 1991

The site provides exposures of Triassic Dolomitic Conglomerate unconformably overlying Carboniferous Limestone. Both rock types have undergone extensive replacement by siliceous iron oxides. The exposures and spoil heaps clearly demonstrate how the iron mineralisation is preferentially hosted by the more porous and permeable conglomerate. The iron ores, which are principally goethite and haematite, are also concentrated along the plane of the unconformity. Disseminated pink barite is also present in the iron-rich horizons, while calcite-barite veins and neptunian dykes can be clearly seen to cut across the iron mineralisation. [cite web | title=Hartcliff Rocks Quarry | work=English Nature | url=http://www.english-nature.org.uk/citation/citation_photo/1005947.pdf | accessdate=2006-07-10]

References