Basics
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Under Construction

Geological Time Definitions    Ma is Millions of Years before current time.

  ERA EPOCH TIME Ma

Phanerozoic

Quaternary

Holocene 0-.01

"

"

Pleistocene .01 – 1.6

"

Tertiary

Pliocene 1.6 – 5.3

"

"

Milocene 5.3 – 23.7

"

"

Oligicene 23.7 – 36.6

"

"

Eocene 36.6 – 57.8

"

"

Paleocene 57.8 – 66.4

"

Cretaceous

  66.4 – 144

"

Jurassic

  144 – 208

"

Triassic

  208 – 245

"

Permian

  245 – 286

"

Carboniferous -Pennsylvanian

  286 – 320

"

Carboniferous - Mississippian

  320 – 360

"

Devonian

  360 – 408

"

Silurian   408 – 438

"

Ordovician   438 – 505

"

Cambrian   505 – 570

Precambrian

    570 - 3800

Movement of Yellowstone Hot Spot (http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html)


 


http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html

Movement Estimates of Hot Spot


http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html

 


http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html

Earthquakes around Hot Spot


http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html

Hot Spot Cross Section


http://pubs.usgs.gov/fs/fs100-03/

Volcano Eruption Processes

 

Volcanic Eruption Sizes

Effect of Yellowstone eruptions on United States vis a vis volcanic dust distribution range


http://www.mines.utah.edu/~rbsmith/RESEARCH/YellowstoneHotspot.html


"Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America in the past few million years; the third largest was at Long Valley in California and produced the Bishop ash bed. The biggest of the Yellowstone eruptions occurred 2.1 million years ago, depositing the Huckleberry Ridge ash bed. These eruptions left behind huge volcanic depressions called “calderas” and spread volcanic ash over large parts of North America (see map). If another large caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Thick ash deposits would bury vast areas of the United States, and injection of huge volumes of volcanic gases into the atmosphere could drastically affect global climate. Fortunately, the Yellowstone volcanic system shows no signs that it is headed toward such an eruption in the near future. In fact, the probability of any such event occurring at Yellowstone within the next few thousand years is exceedingly low."
http://pubs.usgs.gov/fs/fs100-03/

 

Glacier Fields