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September 4, 2016 Weekly Geology Guess, Mississippian Period

September 4, 2016

Greetings from the Bluff Park   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
Mississippian Period

Note:  Resources for the Mississippian Period are scarcer than the previous period.

The Mississippian (also known as Lower Carboniferous or Early Carboniferous) is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earliest/lowermost of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi River valley.

https://en.wikipedia.org/wiki/Mississippian_(geology)

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

“The Devil is in the Detail”

Not only with each period do we have unique animal and critter assemblages, geography, but also some type of plate tectonics or mountain building is going on.

Paleogeography:    The Mississippian was a period of marine ingression in the Northern Hemisphere which consists primarily of marine limestones.

Climate:    The Mississippian consist of warm shallow seas at or near the equator.

 

>    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.

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References include:

–    Wikipedia

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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

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“No copyright infringement intended.
The rights belong to their respective owners”
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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.

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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.  http://tineye.com/

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Next time we will venture into the Pennsylvanian Period.

 
 

Enjoy the adventure!

 

Thanks,

R

Missippian Geography

Missippian Geography. culbrethscience8nickel.blogspot.com

Mississippian Age Seas

Mississippian Age Seas. by Sarah Hamblin, Humboldt.edu.j

Miss. Akmonistion Shark, Symmoriida. 03-16-08.  by Nobu Tamura, spinops.blogspotStethacanthus_BW

Miss. Akmonistion Shark, Symmoriida. 03-16-08. by Nobu Tamura, spinops.blogspotStethacanthus_BW

Mississippian Shark. Fergus Co., MT,

Mississippian Shark. Fergus Co., MT, from Davesrockshop.com

Mississippian Sharks Tooth, 09-22-07. cladodont or saivodus (ctenacanthus family) st. louis limestone west cave putnam co tn 3, by Alan Cressler

Mississippian Sharks Tooth, 09-22-07. cladodont or saivodus (ctenacanthus family) st. louis limestone west cave putnam co tn 3, by Alan Cressler

Mississippian Trilobite, Metazoan.  ww2.humboldt.edu

Mississippian Trilobite, Metazoan. ww2.humboldt.edu

Mississippian, Aarchimedes, bryozoan fossil with holdfast, Indian Springs formation, Crawford County, Indiana11-sideways-with-ruler. 08-21-11.  from Louisville Fossils

Mississippian, Aarchimedes, bryozoan fossil with holdfast, Indian Springs formation, Crawford County, Indiana11-sideways-with-ruler. 08-21-11. from Louisville Fossils

Mississippian, Crawfordsville, Indiana. Decadocrinus Crinoid. from Indiana9 Fossils

Mississippian, Crawfordsville, Indiana. Decadocrinus Crinoid. from Indiana9 Fossils

Missississippian Bi=Valve, Aviculopecten subcardiformis. 10-21-07. by Mark A. Wilson (Department of Geology, The College of Wooster

Missississippian Bi=Valve, Aviculopecten subcardiformis. 10-21-07. by Mark A. Wilson (Department of Geology, The College of Wooster

Mississippian Age Land Scorpion, 28in

Mississippian Age Land Scorpion. Pulmonoscorpius kirktonensis from the Early Carboniferous of Scotland. 06-10-08. Nobu Tamura

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