Streams of Tin
15 ensp 0183 ensp Dartmoor s Past Tin Industry Dartmoor s Past Tin Industry record of tin streaming dates back to the 12th century Evidence of these early workings can be seen in most river valleys as heaps of rubble and waste which in many cases have become overgrown by grasses and bilberries The next process was a form of opencast mining working on the backs of the lodes a naturally occurring band