What does PE stand for?

Permian Extinction (geological event)

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

There have been five great mass extinctions in the history of the earth including: * The Permian extinction 250 million years ago wiped out 70 per cent of all land animals and over 90 per cent of sea creatures.

A stressed world

9780813724485 The Permian extinction and the Tethys; an exercise in global geology.

The Permian extinction and the Tethys; an exercise in global geology

Many species that survived the Permian Extinction died out during the early part of the Triassic Period.

The Triassic Period a Time of Transition

Paperback reprint of a book on the 250-million-year-old Permian extinction, by a University of Washington professor of geological sciences.

Local Offerings Mystery package is steeped in Seattle ambience A ...

Peter D Ward is one of maybe a dozen leading scholars of the Permian extinction.

From the editor

Marine Life The survivors of the Permian Extinction had very little competition.

The Mesozoic Era

In part one, Fraser describes how certain geographic areas sustained life despite the Permian extinction and how early Triassic fish and tetrapods evolved into dinosaurlike creatures.

Dawn of the Dinosaurs: Life in the Triassic

The catastrophe was the Permian extinction 250 million years ago, which was something like the comet that wiped out the dinosaurs a few eons later.

Sketchy theory, fine writing