They also found ochre, bone, charcoal, grindstones and hammer stones.

他们还发现了赭石、骨头、木炭、研磨石和石锤。

youdao

Sponsors participate at every stage of the paleontological process, side-by-side with a site scientist: from the use of hammer and chisel to free fossils from hard rock, to the moulding of bone replicas for display at the on-site laboratory.

BBC: The dinosaur route of northwest Patagonia