|Site of Special Scientific Interest|
|Area||0.9 ha (2.2 acres)|
|Area of Search||County Durham|
|Website: Map of site|
Greenfoot Quarry is a Site of Special Scientific Interest in the Wear Valley district of west County Durham, England. It is a disused quarry, situated in the Wear valley, 1 km upstream from the village of Stanhope.
The site has national geological importance for its exposures of the Little Whin Sill; there are other exposures in the bed of the Wear near to the quarry, but none shows so complete an exposure as Greenfoot Quarry. At the western end of the quarry is a unique exposure which displays columnar jointing in the sill with limestone exposed above and below the intrusion.
At Natural England's last assessment, in June 2006, the site was classed as "unfavourable declining" because, it was noted, the exposure had become covered by vegetation, which obscured the features of interest.
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