0
What else can I help you with?
Why can trilobites be used as index fossils?
Trilobites: The Index Fossil There are many thousands of known species of trilobite fossils found worldwide. Trilobites are considered to be good index fossils because they evolved so rapidly, and this allows geologists the ability to date the rocks in which the trilobites are found. The discovery of trilobites is second only to the discovery of dinosaurs, and new species of trilobites are still being discovered today.
Is ammonites good index fossels?
Yes, ammonites are good index fossils because they had a wide geographical distribution and existed for a long period of time. Their evolution is well-documented, making them useful for relative dating of rock layers.
Describe how geologists use an index fossil and list the three characteristics of a good index fossil?
Geologists use index fossils to date the rock layers they are found in and to correlate similar rock layers in different locations. Three characteristics of a good index fossil are: widespread distribution, short duration in the geologic time scale, and easily recognizable features.
How do the characteristics of an index fossil is useful to geologists?
Index fossils are fossilized remains of organisms that serve as convenient reference points to geologists because they were very widely distributed during a very short period. This means that, if a geologist is trying to figure out how old a certain segment of rock is, the presence of an index fossil will give him a very good idea to a pretty high level of certainty.Most index fossils are aquatic, especially mollusks. This is because (a) mollusks had shells, which are easily preserved, and (b) marine organisms generally fossilize easily because they often live on sand and so turn into sedimentary rock, which forms without volcanic activity (like igneous) or intense pressure (like metamorphic).One good example of an index fossil is Paradoxides, a species of trilobite that was distributed in seas all over the world, but only for a very small amount of time during the Cambrian Period, about 540 million years ago.
Can you find fossils in your backyard?
If you're lucky, and the geology is right, you sure can. You're looking for sedimentary rock, like limestone, although interesting fossils can also be found in sands and gravels exposed by running water. Most people are not lucky enough to have fossils literally in their backyards, but fossils are common enough that one would suspect that most people are living within reasonable driving distance of a good locality. Even volcanic islands like Hawaii can have fossils. Fossils can even be found in large cities; look for excavation sites, armor stone along rivers, or the stone used in buildings.
How are fossils used in determining the age of the Earth?
Index
What makes a good index?
fossils that are common and are found in rare places on earth
Why can trilobites be used as index fossils?
Trilobites: The Index Fossil There are many thousands of known species of trilobite fossils found worldwide. Trilobites are considered to be good index fossils because they evolved so rapidly, and this allows geologists the ability to date the rocks in which the trilobites are found. The discovery of trilobites is second only to the discovery of dinosaurs, and new species of trilobites are still being discovered today.
How are index fossils useful to geologist?
Index fossils provide a reference of time throughout rock layers. In order to be a good index fossil, the life form must have lived for a short and specific amount of time and must have existed over a large area. Index fossils serve as a reference to geologists in correlating rock layers. They can match up (or correlate) the index fossils which helps them match up (or correlate) the rock layers.
Good index fossils have?
wide geographic distribution and short geologic time range
Why chronoperates paradoxus would not be a good index fossil?
they are only been found in a narrow geographic range
Is ammonites good index fossels?
Yes, ammonites are good index fossils because they had a wide geographical distribution and existed for a long period of time. Their evolution is well-documented, making them useful for relative dating of rock layers.
What are the 3 characteristics of index fossils?
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.
Describe how geologists use an index fossil and list the three characteristics of a good index fossil?
Geologists use index fossils to date the rock layers they are found in and to correlate similar rock layers in different locations. Three characteristics of a good index fossil are: widespread distribution, short duration in the geologic time scale, and easily recognizable features.
What makes a fossil an index fossil?
fossils are preserved animals or plants. but index fossils are fossils have wide distribution,many of them,evolves rapidly, and very easy to recognize. Ammonites are index fossils. The fossils were made only in a certain short time period.
Why aren't jellyfish good fossils?
They aren't good fossils because they don't have any bones.
Would a shark tooth make a good index fossil Why or Why not?
It depends on how old the tooth is,but other than that,unless it's a rare shark,it wouldn't make a very good index fossil.
