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Sepember 25, 2016 Weekly Geology Guess, Permian Period

September 24, 2016
Greetings from the Bluff Park Back Porch, way up yonder on Shades Mountain (1,109′) in Alabama:

My discussion on Alabama Geology will continue with the Geologic Time Scale or the Geologic Column and the critters that abide within each pigeon holes.

As with most sciences, especially natural sciences, we love to pigeon hole our data.  Most of the pigeon holes have scientific merit and accuracy.  With the Geologic Time Scale we start with the oldest layers and work upward to the youngest layers.

For some of you this will be new, novel, and maybe heretical.

Expedition Earth: Geological time scale
Permian Period

“The Permian is a geologic period and system which extends from 298.9 to 252.17 million years ago.[8] It is the last period of the Paleozoic, following the Carboniferous and preceding the Triassic of the Mesozoic.”

“In Alabama, the Permian was probable the peak of Appalachian Mtn. formatiion.  Alabama was locked within the dry interior of Pangea.  No rocks from this time period are known from the state.”  by Lacefield


Pangea, Super Continent.

Note:  As a geologist we usually do not talk in number of years but in periods, epochs, and eras.

Permian Period Images

>    Scientific Guesstimates include a “Nuclear Winter” caused by volcanic eruptions from Siberia or China.
The Permian Period ended with the greatest mass extinction event in Earth’s history. In a blink of Geologic Time — in as little as 100,000 years — the majority of living species on the planet were wiped out of existence.  Scientists estimate that more than 95 percent of marine species became extinct and more than 70 percent of land animals.

>    As some of you will notice, as we go up the geologic column the more complex and numerous life becomes.
>    As with most of my weekly fores into geology, with each topic I could write many papers and dissertations.
Note:  I have intentionally reduced the amount of linked graphics in this email due to the amount of space required and trying to untangle everything the following week has been a mess.
References include:


–    Wikipedia
–    “Lost Worlds of Alabama”, Second Edition, 2013, by Jim Lacefield


Editors Note:  It is the intent of this site to keep this discussion as simple as possible, so as to educate the interested general public and not to discuss with the geology crowd the latest geologic theories and nuances.  Thanks, R
“No copyright infringement intended.
The rights belong to their respective owners”
Copyright Disclaimer: Under Section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.


Author’s Request:  If you see any pictures that you know the source and photographer, let me know immediately.  Thanks!  R

Images have been searched by TinEye Reverse Image Search.


Next time we will venture into the Permian Period.
Enjoy the adventure!



Geologic Column Extinction-Intensity-by-rursus






Permian-dimetrodon-gigashomog-mammal-like-13-feet. NA-from-ultimatemetal-com




This Orthacanthus fossil, found in Germany, dates from the Permian, about 260 million years ago.





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