Universal ( indicating a global flood)
Uniform (sea-life tends to be on the bottom, followed by amphibians, reptiles, mammals & few men, indicating a global flood)
Distinct species (no gradual evolution)
Preservation of soft structures, no intermediate earth layer and trans-strata trees- showing rapid deposition
The 4 features of the fossil record include their availability in sedimentary rock, different variations of fossils in different stratified layers, the available fossils belong to organisms that are already extinct, and their composition includes clams and hard-shelled creatures.
The four characteristics of a good index fossil are:
it is distinctive
it is widespread
it is abundant
it is limited in geologic time
it's old, hard and from the past
LULZ
C). a narrow time range and a wide geographic range
hiii
A tropites fossil is a fossil of a tropites. A tropites is a genus of coiled ammonite. They only existed for about 20 million years, which makes it a good index fossil.
To compare the relative ages of fossils, scientists use an early recognized species called an index fossil. An index fossil must have existed for a short period time and must have covered a wide geographical range.
four advantages for fossil fuels: Fossil fuels have high energy density, are readily transportable, are usable with current infrastructure, and
An index fossil must be of a rapidly evolving organism that only existed for a specific period of time, is easily recognizable, is abundantly preserved, and was widespread geographically. Most index fossils are therefore of marine organisms.
An index fossil. An index fossil's age is known, allowing scientists to know the relative age of other fossils based on their position relative to the index fossil. (Ex. If a fossil is deeper in the earth, it is older than the index fossil)
Index fossils help scientists figure out the plants and animals that were alive in a certain time period. There are different types of index fossils that are used for different amounts of time.
It must be distinct from other organisms. It must have lived in a very wide geographic region
C). a narrow time range and a wide geographic range
They are called index fossils.
The absolute age of the index fossil was determine by radioactive dating or another absolute method
hiii
To be an index fossil, it must be widespread, commonly found (sometimes in groups) and have a short life span for which it lived. If a fossil meets all three of these requirements, it is considered an index fossil.
Trilobite
index fossils
The trilobite is the index fossil