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It must be 'fairly recent' to be so well-preserved - so my guess, without looking too closely, would be - deserted Medieval village.

If it's the thingy on Ewe Hill it's:
http://www.keystothepast.info/durhamcc/K2P.nsf/K2PDetail?readform&PRNMAP=N3676

StoneGloves wrote:
deserted Medieval village.
Apparently so. There's what looks like a patch of ridge and furrow just north too.