Brokenbury Quarry, Churston Ferrers
GCR block / key theme: Variscan Structures of southwest England
Associated SSSI: Not applicableGeological / geomorphological features: "Middle Devonian limestone. Foliated, micritic, light pinkish grey, partly dolomitised limestone. Most strongly foliated layers are probably more argillaceous and represent bedding. Crinoid stem fragments and traces of burrows in foliated layers. On the east side of the quarry the foliation/bedding dip is about 10° SW. On the west side of the quarry upright folds about 1m in amplitude with a NS trend, deform the earlier foliation. These folds have been partly excavated, possibly for research purposes and are exposed in three dimensions."
Reasons for registration as a RIGS sites: "The main interest of the quarry lies in the later folds, which deform the early foliation, and are particularly well exposed at the present time. Later fold structures are seldom seen in inland exposures. The main quarry face provides evidence of the nature of the earlier structure and lithology to which the laterfolds are related and can assist the overall structural interpretation of the district."