Fossils

Organic things get buried in locations favourable for the formation of fossils (stream deltas, ocean floor.) The mud (or whatever) forms a hard cast about the thing. The thing then decomposes and gets flushed away. The hole fills with a mineral the local water is rich in. This is a fossil.

skull fossil and amour fossil

There are three basic types of rock; sedimentary, igneous and metamorphic. Igneous rocks are formed by volcanic action and don't contain fossils. Sedimentary rocks are formed, usually under water, by eroded material accumulating. Metamorphic rocks are formed when sedimentary rocks are changed by heating and/or pressure. From this, you can see that sedimentary rocks are the most likely to contain fossils, although metamorphic rocks also can contain fossils. Any sedimentary rock can contain fossils, but some make fossil hunting easier. Shales and mudstones are particularly good; chalk is pretty much entirely made of fossils - it's formed of skeletons of small organisms, but its difficult to see the individual fossils.

Not sure. If they didn't leave a fossil how would we know that they existed.

By exploring what plants and animals are found in the same layer of sediment it is easier to determine the climate at that point in tame. Additionally, the precipitation of that era can be documented.

fossils are something like a plant or bone preserved in rock, then when the preserved thing finally decays there is an impression left in the rock. marine fossils are marine animals, plants, or shells (basically anything in the water, hence marine) that are now fossils.

are the remains of specics that existed on rath for short periods of time are the remains of specics that existed on rath for short periods of time the REAL defintion: a fossil known to have lived in a paritcular geologic age that can be used to date rock layer in which is found

False, there are many transitional forms in the fossil record.

Osteolepis

Eusthenopteron

Panderichthys

Tiktaalik

Elginerpeton

Obruchevichthys

Ventastega

Acanthostega

Ichthyostega

Hynerpeton

Tulerpeton

Pederpes

Eryops

Pedopenna

Anchiornis

Archaeopteryx

Confuciusornis

Ardipithecus ramidus

Australopithecus afarensis

Australopithecus africanus

Australopithecus anamensis

Australopithecus garhi

Australopithecus aethiopicus

Australopithecus boisei

Australopithecus robustus

Homo habilis

Homo rudolfensis

To name a few.

It depends on their size and chemical composition. Fossils closely akin to the limestone matrix in composition would need to be manually removed by use of dental tools, scrapers, or electric Dremel type tools. If the fossil has been replaced by silica, it could be removed by the application of acid to remove the limestone that surrounds it.

yes it can be used

fossil

A Paleontologist is a person who studies fossils.

what is this, your homework? yes and its hard.

wide geographic distribution and short geologic time range

you might find them i desert

I do not rcall what the exact name of the watch was however, I had one too. I still have it but the water is all murky and I lost the back. Check on ebay, you may find one.

yes. It gives vital clues to uncover the events that once occurred on earth.

no - not common. corals are often mistaken for beehives. Check out "favosites."

# It was sedimentary rock. # They were below the tree line. # The rock layer was exposed. # They were able to recognize tropical plants of ancient origin. # The fossils were once live plants at a time in which a tropical climate existed. # The climate is different now than it was at the time the fossil plants were alive. # The area where the fossils were found was once closer to the equator than it is now.

fossil calcification is when the calcium in a bone intergests and causes the bone to rott away. the calcium in a bone desintergrates leaving only the fossil behind.

They are generally called palaeontologists.

It's rocks are severely bent and folded.

A fossil of a fern in an area would indicate that at one time, the region had a temperate to tropical climate. Ferns cannot grow if the climate is too cold, though they can grow in cool climates and moderate elevations.

The principle of Fossil succession states that fossil organisms succeed one another in a definite and determinable order. Therefore, any time period can be recognized by its fossil content.

Fossils give a record as to what organisms lived throughout different time periods. Generally speaking, the lower layers of soil show the oldest fossils, which aids scientists in following the progression of evolution of an organism. Also, radioactive carbon dating is used in dating how old a fossil is by finding the amount of carbon^14, and then calculating how many half lives have passed to reach this amount.