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I discovered this half buried mineralised carcass today on the banks of the old river Tees in Middlesbrough Cleveland North East England. But only had a poor phone camera so the images aren't great, the animal seems to have died were it is now, I aim to excavate it tomorrow, and will report my findings.
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I am now in the process of cleaning and preserving the skull and mandible.
The pics below show the piece after a basic clean, this Equus piece shows no signs of use by man either for transport or work.
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I have tested for magnetic content and again have found this skull and mandible like a lot of other mineralised bones excavated in the south west of Cleveland attract a magnet, as ive stated before I believe this is because the animals absorbed some form of Magnetite, either when alive or during burial.
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Note the round magnet attached to the bone outlined in red.
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1- This image shows the latest preserved bone excavated from less than a square metre of the lake deposits, at Stainsby beck. 
2 - Bos skull with a distal Humerus piece attached.
3- The bundle in this image contains a small sus skull and mandible it was excavated at the same level and right next to the Bos skull.
5- This image shows the bones cleaned using soap and water, and includes a Bos skull that has sustained a violent impact to its right side, Wild boar skull and Mandible, Bos skull fragment with horn core attached, large Lumber vertebrae that looks to be Cervid, Ovis horn core piece possibly used as a tool, unknown distal tibia piece, unknown metatarsal.
6 - Wild boar skull.
7 - The skull looks to have sustained considerable damage to its right side, this is as with the bos skull unlikely to have happened after it was buried.
8 - I believe the Stainsby lake deposits were possibly the site of some sort of sacrifice, involving both Humans and animals.
