Would you expect to find a well preserve dinosaur bone in a metamorphic rock like schist?

NO, a metamorphic rock is a new rock formed when existing rockes are spueezed or heated. If you were to find a dinosaur bone in a rock it would be a sedimentary rock, which is a rock formed by layers of sediment, Which means a dinousar bone could of been on top of a layer of sediment and another layer of sediment went on top of that, formed a rock that had a dinosaur bone in it.