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--- earth:geohammers:m_bce_events [2017/08/27 21:56]
127.0.0.1 external edit
+++ earth:geohammers:m_bce_events [2018/05/24 10:33]
khavikanum
@@ Line 24: / Line 24: @@
 [[https://phys.org/news/2017-06-previously-unknown-extinction-marine-megafauna.html]]\\
 [[https://en.wikipedia.org/wiki/Pleistocene]]\\
+[[https://phys.org/news/2018-05-supernovae-responsible-mass-extinctions.html]]\\
 ==== Quarternary Glaciation, 3M BCE ====
@@ Line 53: / Line 54: @@
 [[http://en.wikipedia.org/wiki/Karakul_(Tajikistan)]]
+==== Supernova Event, 8M BCE ====
+A rain of iron-60 from a 'nearby' supernova may have depleted the ozone significantly, contributing higher ionizing solar radiation at higher latitudes.
+[[https://phys.org/news/2018-05-supernovae-responsible-mass-extinctions.html]]
 ==== Nordlinger Ries Impact Event, 14.4M BCE ====
@@ Line 193: / Line 200: @@
 [[http://en.wikipedia.org/wiki/Manicouagan_impact_crater]]
+==== Carnian Pluvial Event, 230M BCE ====
+Wrangellian eruptions over five million years inject carbon dioxide into the atmosphere, acififying the oceans and contributing to a two million year long flooding period that changed the land from hot and dry to hot and wet.  Plant growth on land erupted, changing the ecological support, and leaving only the dinosaurs best suited to eat and digest the woodier plant matter.
+[[https://en.wikipedia.org/wiki/Carnian_Pluvial_Event]]
 ==== Permian-Triassic Extinction, 252M BCE ====

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