[1forall]

..buried rapidly in a low-oxygen environment that prevented decay.

You mean like an enormous cataclysmic flood?

[Blackacre]

..buried rapidly in a low-oxygen environment that prevented decay.

You mean like an enormous cataclysmic flood?

Water is not a low-oxygen environment.

More likely, this dinosaur was entombed in a landslide or something similar. This is an interesting find, but like the T-Rex soft-tissue (which wasn't really the soft-tissue itself, but the mineralized replacement), it's probably just a really unusual situation.