ALTER43



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I participate in Tumblr on two levels, as a blogger and as an artist. As a member of the blog community, I am the curator and publisher of my own eclectic archive of photography, art, quotes, video and music. As an artist, Tumblr has become the first venue for the exhibition of my own digital images from the groups "Particles and Waves" and "Extrusion Maps." I appreciate the free exchange with other members and the sharing of my collection, as well as the exhibition of my own work within such an easy to use, non-commercial environment.

http://www.douglasprince.com/


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klammer

rhamphotheca:

The End Permian Extinction

The Permian–Triassic (P–Tr) extinction event, informally known as the “Great Dying”, was an extinction event that occurred 252.28 million years ago, forming the boundary between the Permian and Triassic geologic periods, as well as the Paleozoic and Mesozoic eras. It is the Earth’s most severe known extinction event, with up to 96% of all marine species and 70% of terrestrial vertebrate species becoming extinct. It is the only known mass extinction of insects. Some 57% of all families and 83% of all genera became extinct. Because so much biodiversity was lost, the recovery of life on Earth took significantly longer than after any other extinction event, possibly up to 10 million years. This event has been described as the “mother of all mass extinctions.”

Researchers have variously suggested that there were from one to three distinct pulses, or phases, of extinction. There are several proposed mechanisms for the extinctions; the earlier phase was likely due to gradual environmental change, while the latter phase has been argued to be due to a catastrophic event. Suggested mechanisms for the latter include large or multiple bolide impact events, increased volcanism, coal/gas fires and explosions from the Siberian Traps, and sudden release of methane clathrate from the sea floor; gradual changes include sea-level change, anoxia, increasing aridity, and a shift in ocean circulation driven by climate change

(read more: Wikipedia)

(image credits: T - Dr. Ron Blakey; BL - crinoid by Vasil; BM - Nycteroleter ineptus by Dmitry Bogdanov; BR - uncredited)

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Scientific American: Geologists Link Great Dying to Vulcanism

04:34 am, reblogged from fauna by alter43361 notes

Notes
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    (via TumbleOn)
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    I just love Geology.
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    cthulhu farted and everybody died
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