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Alligators and crocodiles died out in Europe as the climate cooled in the Pliocene Epoch. The modern species Alligator mississippiensis, having evolved in the Miocene, continued into the Pliocene, except with a more northern range; specimens have been found in very late Miocene deposits of Tennessee.
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What is the time range of Precambrian Era?
Precambrian time - The period in the geologic time scale from the formation of the Earth to the beginning of the Palezonoic era, from about 4.6 billion to 543 million years ago.
What do periods on the geologic time scale represent?
An era, in geologic terms, is a geological time period encompassing two or more geologic periods.
What is the purpose of the geologic time scale?
The scale outlines the development of Earth and life on Earth.
What is called the record of life forms and geologic events in earth's history?
the record of life forms and geologic events in earth's history is actually called the "Geologic time scale" fine sir. good day
Why did geologists develop the geologic time scale?
The geological time scale is the geologic history of the planet from formation to the present. It starts with large divisions of time called eons and is subdivided into successively smaller units of time based on dominant lifeforms, extinction events, even climate. The development of the geologic time scale was initially based on the observation and reasoning that deeper layers of rock are generally older than less deep layers in what is called the "Law of Superposition".Paleontologists look for index fossils in fossil bearing sedimentary rock. Index fossils are organisms that were widespread, rapidly evolving, and only existed for a short period of time as evidenced by their appearance in the fossil record of specific rock strata. The appearance of a fossil alongside an index fossil gives a rough approximation of the age of the fossil in relative terms as it would appear on the geologic time scale. The appearance of the same fossil alongside index fossils of different geologic ages means that the fossil organism spanned multiple geologic time periods. Associations of specific strata alongside radiographically datable igneous and metamorphic rock determines the absolute age of a fossil.A period of around 4,600,000,000 years, the largest groupings of geologic time are eons, followed in descending order by era, period, epoch, and age.The geologic time scale is very important, especially in fields involving the exploration and retrieval of fossil fuels, which are geologically date range specific.
What era of the geologic time scale was the longest?
precambrian times
What era of the geologic time scale do you live in?
This period is called holocene.
Was era or period longer?
On the geologic time scale, an era is longer than a period. There are 12 geologic eras in total and they are composed of geologic periods. For instance, the Mesozoic era is composed of the Triassic, Jurassic and Cretaceous periods.
Which is not a major period of the geologic time scale?
Cenozoic is not a major period of the geologic time scale. The scale is broken down into eras. Cenozoic, Mesozoic and Paleozoic are all part of the Phanerozic era.
What is the largest division on the geologic time scale is?
an era uhm NO ^ an eon . (apex)
What categories are in the geologic time scale?
Eon, Era, Period, Epoch (from largest to smallest)
A record of events in earth history?
geologic time scale
What is largest division on the geologic time scale is what?
an era uhm NO ^ an eon . (apex)
After precambrian time what are the two basic divisions of the geologic time scale?
Era & period Tracy Feng
How many eons are there?
There are four eons dividing the geologic scale. Three occurred during the Precambrian era.
What is a division on the geologic time scale?
The divisions of the geologic time scale are divided into four eras. from earliest to closer to the present is the Precambrian, Paleozoic, Mesozoic, Cenozoic. During these time periods, there were several major evolutionary events. Most commonly known are the dinosaurs and humans. Hope that helped :)
Epochs of the geologic time scale include the Holocene Pilocene and Miocene When did these epochs occur?
Relatively recently in the Cenozoic era
