silicified wood from the jungar basin in xinjiang, also known as wood fossils

ancient archeology artifact basin beauty carboniferous cenozoic collection cretaceous discovery environment eocene epoch evolution excavation exploration forest formation fossils geology history holocene jungar jurassic mesozoic mineralization minerals miocene museum nature paleontology paleozoic petrification petrified pleistocene pliocene preservation rarity research rocks science stone stratigraphy study time triassic wonder wood xinjiang