Southern earthworks defences.The southern defensive earth rampart of the fort,is on the right of this image and is still about a metre tall,above the surrounding field.
see http://pastscape.english-heritage.org.uk/hob.aspx?hob_id=19926
see http://www.roman-britain.org/places/greta_bridge.htm
see http://www.pastscape.org/hob.aspx?hob_id=1143630&sort=4&search=all&criteria=greta bridge roman fort&rational=q&recordsperpage=10
see http://www.pastscape.org/hob.aspx?hob_id=19926&sort=4&search=all&criteria=greta