Is this part of a dinosaur skull?

[dingo2]

Found in the scollard formation. I thought it appears to be skull material, but would obviously only be a small portion if so. 

@Troodon

[jpc]

looks pretty worn.  I bet it is part of a vertebra

[Rockwood]

Chunky looking with nearly right angles in the grain. Vertebra indications alright.

[Troodon]

That flat portion in your second photo looks more like vertebrae than skull so I agree with the others