Barn Hill Rocks
There are several granite outcrops sitting on the south-eastern side of Barn Hill, with good views to Vixen Tor.
Eric Hemery in High Dartmoor; "The upper valley side, pointing slightly west of north, comprises Whitchurch common, the crest and west slope (Tavy) being known as 'Barn Hill'. Stone pits and small weathered rock outcrops occur on the southern portion of the hill..."
There is another piece of granite bedrock, further north, somewhat detached from the main group here, at SX 5337 7495, shown in the photo below.