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Depends on the type of eurypterid. In short, no; we don't know enough about them to say that they are only found in certain time zones.
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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 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.
How are amber fossils the same from regular fossils?
the amber will envolve into a aratactol and the others r not realy that good but thetre rare hope that helps you
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.
An air quality index of 0-15 is?
Very good.
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
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.
What are graptolites?
Graptolites were hemichordates that appear in the fossil record resembling a series of sawblade teeth. They are good index fossils for the Ordivician and Silurian geologic time periods.
Why aren't jellyfish good fossils?
They aren't good fossils because they don't have any bones.
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.
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.
What is an index fossil and how is useful?
Index fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages). They work on the premise that, although different sediments may look different depending on the conditions under which they were laid down, they may include the remains of the same species of fossil. If the species concerned were short-lived (in geological terms, lasting a few hundred thousand years), then it is certain that the sediments in question were deposited within that narrow time period. The shorter the lifespan of a species, the more precisely different sediments can be correlated, and so rapidly evolving types of fossils are particularly valuable. The best index fossils are common, easy-to-identify at species level, and have a broad distribution-otherwise the likelihood of finding and recognizing one in the two sediments is minor. Ammonites fit these demands well, and are the best-known fossils that have been widely used for this. Other important groups that provide index fossils are the corals, graptolites, brachiopods, trilobites, and echinoids (sea urchins).Conodonts may be identified by experts using light microscopy such that they can be used to index a given sample with good resolution.{cn}}Fossilized teeth of mammals have also been used. Geologists use both large fossils (called macrofossils) and microscopic fossils (called microfossils) for this process, known asbiostratigraphy. Macrofossils have the advantage of being easy to see in the field, but they are rarer, and microfossils are very commonly used by oil prospectors and other industries interested in mineral resources when accurate knowledge of the age of the rocks being looked at is needed.
What makes a species a good index fossil?
An index fossil is used as an indicator of which era/epoch was preserved. The major characteristic necessary to be an index fossil include abundance, widely distributed, but lived for a short period of time.
