An Intelligent Man's Guide to M9+ - Cascadia Rising - M9+ to M10+ Cascadia Megaquake and Subsequent Tsunami in Pacific Northwest U.S. - Washington, Oregon, California - and West Coast British Columbia. We are overdue. These inter-plate earthquakes are the planet's most powerful, with moment magnitudes that can exceed 9.0+. Please feel free to copy and paste one, all, or part. Please comment below each post.
Tuesday, April 25, 2017
540 Million Years (One MA = One Million Years) in 6:34 minutes - Plate Tectonics, 540Ma - Modern World - Scotese Animation 022116b
Plate Tectonics, 540Ma - Modern World - Scotese Animation 022116b
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.
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
signify very long time periods into the past or future. For example,
the dinosaur species Tyrannosaurus
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.