Hi Morlock,
Yes that's the site that was a little sniffy about the remains.
I've been for my stroll, the shape you first highlighted on zoomearth is a spoil tip, Brooks correctly said what I thought might have been a spoil tip is a large landslip in the bend in the river.
I'll look at the photos I took today and if they are clear enough I attached to the various sites on AditNow, to be honest it was a bit dull and cool at Tynehead and I got home a few minutes ago and it's bright sun and pleasantly warm. That's the price that has to be paid;(
Edit:
As a ps I've just looked at the landslip in OS' 3D aerial rotation and it's quite a large chunk of land that's gone, perhaps a bog burst? probably quite dramatic to have seen.
Jim