It is especially helpful as the sole navbox template / place to also simply see all the Precambrian and Phanerozoic Eon's epochs and ages together, and their relationships.
12.
However, there is a period of biological change which makes this time period a good one to demarkate the Cambrian from the earlier Phanerozoic eon's periods and the Precambrian supereon.
13.
The following time span from 541 million years ago to the present day is the Phanerozoic Eon, during the earliest period of which, the Cambrian, oxygen-requiring metazoan life forms began to appear.
14.
The Phanerozoic eon ( the last 540 million years ) marked a rapid growth in biodiversity via the Cambrian explosion a period during which nearly every phylum of multicellular organisms first appeared.
15.
Connelly argues that the age of this hypothetical impact is approximately 545 mya which puts it just before the Cambrian explosion ( 542 mya ) of the current Phanerozoic eon ( 541 mya ).
16.
Some sources ( Whiteside et al 2010 ) give a date 201.4 Ma . and is one of the major extinction events of the Phanerozoic eon, profoundly affecting life on land and in the oceans.
17.
The Caballo Mountains are essentially unique in New Mexico because their section of exposed rocks begins in Precambrian time, and runs through every geological period of the Phanerozoic eon with the exceptions of the Triassic and Jurassic.
18.
He concentrated on the geology and crustal geophysics that define the products of the last 540 million years of Earth history ( the Phanerozoic eon ), throughout which plate tectonics had produced convergent-plate geologic assemblages like those forming today.
19.
Utilizing the currently accepted value of 542 Ma, million years ago ) for the beginning of the Cambrian Period, and using 11 geologic periods in the Phanerozoic Eon, an updated value for Woodward s geon would be about 49.4 million years.
20.
Researchers from Johns Hopkins and the State University of New York at Binghampton have studied this water to learn how the chemistry of the oceans has changed during the Phanerozoic eon, the time of abundant animal life from about 540 million years ago to the present.
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