because over time the earth bilds up covering the rock
sand or under ground doesnt matter
not that often
Paleontologists are looking for fossils in sedimentary rock.
yes
The oldest fossils in Australia are 3.5 billion year old stromatolites. Stromatolites are layered accretions of prokaryotic microbes, most often made up of photosynthetic organisms. Stromatolites still live in Australia today.
Fossils can be found almost anywhere where the rocks are old enough and conditions in their deposition were right. Generally fossils are found in sedimentary rocks, often where there used to be lakes or shallow seas.
no they are found in Sedimentary rocks
Because shark teeth are hard enough to be fossilized
Because shark teeth are hard enough to be fossilized
they study first the soil composition of the ground check for valuable minerals and geographic chemicals which will be analyzed if the soil has a huge possibility to have an bones and fossils. this process may be skipped if a local community did find some bones there. the next step would be carefully digging the bones in there.
Metals found native in the ground are metals which are so unreactive that they are still found unchanged or "native"
under the ground....they're a dinosaur.