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Discontinuity surfaces (bedding planes and various types of unconformities), significant changes in mineralogy or grain size or changes in the types of fossils present in the rock may all help identify differing rock layers.
Voids left behind by once present fossils are called 'trace fossils'.
Fossils stated being made as soon as life appeared on Earth (about 3600 million years ago) and they continue to be made at present.
All over present day Utah, but mostly in central Utah
Humans are not index fossils because human remains are only found in very recent unlithified deposits up to the present, which we would usually already know to be very recent.
JJJ
changes in the environment e.g. the place, temperature, climate.
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Discontinuity surfaces (bedding planes and various types of unconformities), significant changes in mineralogy or grain size or changes in the types of fossils present in the rock may all help identify differing rock layers.
Voids left behind by once present fossils are called 'trace fossils'.
Voids left behind by once present fossils are called 'trace fossils'.
Lets say if you take any plant of your choice and subject it to extreme conditions of pressure temperature etc., and also aging process then you get some what similar to a Fossil.that is the fossil (considering plant fossils) and other early plants are all "similar" to present day plants (or present day living things) (barring evolutionary changes).Hope this Helps
Fossils stated being made as soon as life appeared on Earth (about 3600 million years ago) and they continue to be made at present.
It is "changes".
All over present day Utah, but mostly in central Utah
Fossils are bones stick together and they can be a person or animal and if it was a animal you can tell what animal is it where it lived and by the condition you can say it came form a long time ago or present day.
They can be studied from fossils but the species or animal is no longer present. Hopefully there is no extinction to any animals.