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Scientists believe that humans arrived on earth during what period. A quaternary. B tertiary. C cretaceous. D triassic?
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∙ 16y ago
scientists belive human beings first developed on earth during :- A. quaternary.
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∙ 16y ago
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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 did dinosaurs live in?
The dinosaurs lived in the Mesozoic Era, which includes the Triassic, Jurassic, and Cretaceous periods. The first dinosaurs appeared in the late Triassic and went extinct at the end of the Cretaceous.
What period of time did ammonites live in?
Devonian to cretaceous is the the geological age of ammonoids They first appeared during the Devonian Period (approximately 410 million years ago). They almost died out at the end of the Permian Period (251 million years ago), and again at the end of the Triassic Period (205 million years ago). They finally became extinct at the end of the Cretaceous Period (65 million years ago), perhaps as a result of a lowering of ocean levels.
What happened during the triassic period?
The major events in he Triassic time period are Pangea{the supercontinet}, It follows the largest extinction in history, animals, plants, and reptiles appeared, and when surviors of that event spread and recolonized.
12 periods in order from the preCambrian to the quaternary?
The 11 geological periods from Precambrian to Quaternary are :-Paleozoic Era Cambrian Period - 542 to 488.3 million years agoOrdovician Period - 488.3 to 443.7 MaSilurian Period - 443.7 to 416 MaDevonian Period - 416 to 359.2 MaCarboniferous Period - 359.2 to 299 MaPermian Period - 299 to 251 MaMesozoic Era Triassic Period - 251 to 199.6 MaJurassic Period - 199.6 to 145.5 MaCretaceous Period - 145.5 to 65.5 MaCenozoic Era Paleogene Period - 65.5 to 23.3 MaNeogene Period - 23.3 to 2.588 Ma
The major divisions in geologic time are?
Precambrian Paleozoic: -cambrian -ordovician -silurian -devonian -mississippian -pennsylvanian -permian Mezozoic: -triassic -jurassic -cretaceous Cenozoic: -tertiary -quaternary
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 are the 7 periods that species have roamed on earth?
The earliest period when amphibious creatures crawled out of the ocean to walk on land would have been the Devonian Period. Following that were the Carboniferous, Permian, Triassic, Jurassic, Cretaceous,Tertiary and Quaternary Periods.
What are the areas on the geologic time scale?
Paleozoic Era- Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian Mass Extinction (Permian-Tertiary) 248 mya Mesozoic Era- Triassic, Jurassic, Cretaceous Mass Extinction (K-T) 65 mya Cenozoic- Tertiary, Quaternary
What period came first Jurassic cretaceous or triassic?
jurassic The Triassic was the earliest period of the Mesozoic, followed by the Jurassic then the Cretaceous. The Cretaceous was of the greatest duration.
In what geologic time period did the Triassic Jurrassic and Cretaceous occur?
That is easy, the first is precambrian time, next you get the paleozoic era, which has Cambrian, ordovician, silurian, denovonian, carbonferious periods, Next you get the mesozoic era which contains the next three, which are triassic, jurrasic, and cretacous periods. Lasty you get the Cenozoic era which contains the last two which are the tertiary, and the quaternary!
Did mosasaurs live in the Jurassic or triassic or cretaceous?
They lived in the Late-Triassic and the Cretaceous, but disappeared through the Jurassic!
How many periods are in each era?
there are different periods in each era. In the Cenozoic era, there are 2 periods, Quaternary and Tertiary. Mesozoic era has 3 periods, Cretaceous, Jurassic, and Triassic. Paleozoic has 7 periods, Permian, Carboniferous, Devonian, Silurian, Ordovician, and Cambrian. Precambrian is just the present, no time periods in it.
Did the dinosaurs died at the end of the cretaceous Jurassic or triassic period?
Cretaceous.
Which period is older than the Triassic period?
The Jurassic Period followed the Triassic.
What era is divided into Triassic?
The Mesozoic era is divided into Triassic, Jurassic and Cretaceous time periods.
What came after the triassic period?
After the Triassic period, the Jurassic period began, followed by the Cretaceous.
