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Layer 2
Manley Rogahn
melinda pack
A. Layer 2 Apex
The Doushantuo rock formation in China encompasses fossils. The fossils within the Doushantuo rock formations have been found to contain organisms that share traits with Amoebas.
Sediment
An index fossil is organisms that is a signature for certain geographical eras. Index fossils are a charting of time that is used to describe other organisms found in that time era. The fossils were found in the stones that are determinations by carbon indexing and therefore are index fossils.
Most fossils are found in sedimentary rock, which is the most common type of rock on Earth. Sedimentary rocks form when particles of sediment are deposited by water or wind, and then hardened over time.
Using methods such as radioactive dating, scientists can determine the approximate age of a fossil or the rock in which it was found. Utilizing this knowledge of approximate age, scientists can compare progressive fossils, and identify changes. Changes are often minimal, and sometimes organisms do not change at all for large amounts of time, making comparative analysis of fossils a tedious task. Some eras produced better fossils than others. This can have several causes, such as particularly prolific habitation of environments that more easily produce fossils, general population booms, certain mass extinction events, and even happenstance. Because some eras produce better or more fossils, and some produce few to almost none, the fossil record can sometimes falter. In such cases, scientific investigations may be forced to fill in blanks between species using genetic analysis of preceding and proceeding species or groups within species, if the fossil(s) contain(s) any remaining genetic material. In other cases, computers will be used to recreate images of the species based on fossils, and identify progression between species. In any case, the fossil record is often used as a base off of which to obtain or recreate further information about an organism's evolutionary history.
layer5
Small shelled marine organisms are the most common easily observable fossils found in rocks.
Small shelled marine organisms are the most common easily observable fossils found in rocks.
Modern animals may be related to fossilized organisms.
fossils
fish fossils and little animal fossils and also shells
unicellular prokaryotes
unicellular prokaryoytes
fish fossils and little animal fossils and also shells
Fossils are most likely to be found in sedimentary rock.
The Doushantuo rock formation in China encompasses fossils. The fossils within the Doushantuo rock formations have been found to contain organisms that share traits with Amoebas.
SEDIMENTARY