Caption text Lead-rich slag from the 19th century mining operations. Blackmoor, Charterhouse Credit NERC Key stages Key Stage 3 Key Stage 4 Key Stage 5 Higher Education Lifelong learning Themes Cultural Heritage Geology Land Management Wildlife Curriculum subject Geography Science Discover how spoil heaps produced by the lead mining industry provide a particularly distinctive Mendip habitat. Keywords industrial lead working lead Spoil heap mining spoil slag Foundations of Mendip (British Geological Survey) – Old lead workings