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The difference between
The differeence between the Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell creatures because of thee evolved predators.
The difference between
Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell
creatures because of the evolved predators.rian fossils
Cambrian and Pre-Cambrian is that the Cambrian fossils are ones of hard shell
creatures because of the evolved predators.
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What is the significance of the didvision between the Cambrian and PreCambrian periods?
During the Cambrian period, life began to appear on the planet.
What are the major subdivisions of geologic times?
The major subdivisions are the Precambrian, Palaeozoic, Mesozoic and Cenozoic, which are subdivided into Archean and Proterozoic (Precambrian), Cambrian, Ordovician, Silurian, Devonian, Carboniferous (or Missisipian and Pennsylvanian in the US) and Permian (Palaeozoic), Triassic, Jurassic and Cretaceous (Mesozoic) and Tertiary and Quaternary (Cenozoic). For a graphical representation, see http://geomaps.wr.usgs.gov/socal/geology/geologic_history/images/geologic_time_scale.jpg
What era featured the longest periods with no life forms on Earth.?
Precambrian
After precambrian time what are the two basic divisions of the geologic time scale?
The two basic divisions following the Precambrian on the geologic time scale are the Paleozoic Era and the Mesozoic Era. These eras are further divided into periods, such as the Cambrian, Devonian, and Permian in the Paleozoic Era, and the Triassic, Jurassic, and Cretaceous in the Mesozoic Era.
What are the periods that make up the precambrian Era?
4,028,000,000 years.
How many periods are in each era?
There are three major geological eras - Paleozoic, Mesozoic, and Cenozoic. Each era is divided into periods, with the Paleozoic era having six periods, the Mesozoic era having three periods, and the Cenozoic era having two periods.
do Eras and periods both appear at the start of the Cambrian period?
farts
What time period would a brachiopod be alive?
Brachipods evolved about 540 million years ago during the Cambrian period. They still exist today, so they also were alive during all of periods between now and the Cambrian.
What are the periods that divide the early paleozoic?
Devonian, Carboniferous and Permian Periods
Why is the PreCambrian era not divided into periods?
The Precambrian era is not divided into periods because the geological record from this time is more limited and less well understood compared to more recent eras. The lack of distinct fossils and rock layers make it challenging to establish clear boundaries for periods within the Precambrian. Instead, geologists have divided it into eons - the Hadean, Archean, and Proterozoic eons.
What order are triassic Jurassic Cambrian devonian?
The correct order is Cambrian, Devonian, Triassic, Jurassic. These time periods are part of the geological timescale representing the order in which they occurred in Earth's history.
What is the division of the Cambrian and Pre-Cambrian periods?
The Cambrian period occurred approximately 541 million years ago, marking the beginning of the Paleozoic Era. The Pre-Cambrian is a broad division of time before the Cambrian period, encompassing about 4 billion years of Earth's history, including the formation of the planet and the evolution of life prior to complex multicellular organisms.
