Plate Tectonics, 540Ma - Modern World - Scotese Animation 022116b
https://youtu.be/g_iEWvtKcuQ (6:34 minutes)
An Intelligent Man
Published
on Feb 21, 2016
This
animation shows the plate tectonic and paleogeographic evolution of
the Earth back to 540 million years, (ago). It also shows the major
ice ages at : 20,000 years, 300 years, and 445 million years
(ago).
This animation should be cited as
Scotese, C.R., 2016. Plate Tectonics, Paleogeography, and Ice Ages, (Modern World - 540Ma), YouTube Animation https://youtu.be/g_iEWvtKcuQ.
This animation should be cited as
Scotese, C.R., 2016. Plate Tectonics, Paleogeography, and Ice Ages, (Modern World - 540Ma), YouTube Animation https://youtu.be/g_iEWvtKcuQ.
From
Wikipedia
Ma
(for
megaannus), is a unit
of time equal
to one million,
or 106, years, or 1 E6 yr. "Ma" is commonly used in
scientific disciplines such as geology, paleontology, and celestial
mechanics to
signify very long time periods into the past or future. For example,
the dinosaur species Tyrannosaurus
rex was
abundant approximately 66 Ma (66 million years) ago. The duration
term "ago" may not always be indicated: if the quantity of
a duration is specified while not explicitly mentioning a duration
term, one can assume that "ago" is implied; the
alternative unit "mya" does include "ago"
explicitly. In astronomical applications, the year used is the
Julian year of precisely 365.25 days. In geology and paleontology,
the year is not so precise and varies depending on the author.
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