Talk:Paleozoic

Deleted text
68.3.29.118 22:37, 29 August 2006 (UTC) anyone know who defined the eras and when? Moved from article Dittaeva 14:15, 13 Feb 2004 (UTC)


 * Geological Eras arose from consensus among Geologists and Palæntologists. Various people defined the periods and shorter timescales over hundreds of years.  Mostly, the names are placenames whence one finds the rocks originally used for defining the era (many exceptions exist to this rule of thumb).  &#364;alabio 00:20, 2004 Oct 6 (UTC)

Direct Quotes
So I just noticed that the entire Climate section is copied from here:http://www.palaeos.com/Paleozoic/Paleozoic.htm#climate 24.20.192.251 (talk) 02:09, 4 February 2009 (UTC)

Greek or latin meanings
somebody should put the greek or latin meanings of paleo ? and zoic = life at the beginning of entrys such as this one (ie scientific ones) it is muyy helpful


 * Palæo means old. These are the geological eras and their meaning:


 * Proterozoic
 * Protolife
 * Palæozoic
 * Old Life
 * Mesozoic
 * Middle Life
 * Cenozoic
 * Recent Life.

&#364;alabio 00:20, 2004 Oct 6 (UTC)

Table of contents
Does anyone know how to make the Contents box appear on this page?

Never mind everyone. I have found out how to do it. For everyone who needs to know, put Overview at the top of the first paragraph. Then save the change. This should make the contents box appear.:


 * No, we don't start with a header. If there are too few sections <4 the table of contents won't be displayed. I removed a bunch of duplication added sometime ?? Also a couple headers so your TOC shows up :-) Vsmith 04:21, 15 February 2006 (UTC)

Mississippian-Pennsylvanian
Rompe's recent change, removing Mississippian and Pennsylvanian, is, strictly speaking, correct. The ICS considers them to be epochs of the Carboniferous. However, as explained at Mississippian and Pennsylvanian, in North America both are indeed treated as full geologic periods. I wonder if a similar explanation is appropriate here?--Geologyguy 12:42, 17 July 2006 (UTC)

geological column assumptions?
There are many assumptions in this article regarding the references to the geological column which are put forward as facts. This is still theoretical as are all the dates. The geological column exists nowhere in the world! This article should be noted as being based on generally accepted, but unproven, theories. Refer definition empirical science and please apply.

== this is extremely important to fix up and expand!

Capitalization per ICS
I've changed some capitals on time period names per the [http://www.stratigraphy.org/upload/bak/chron.htm International Stratigraphic Guide, Chapter 9. Chronostratigraphic Units] which states:
 * A formal chronostratigraphic unit is given a binomial designation - a proper name plus a term-word - and the initial letters of both are capitalized. Its geochronologic equivalent uses the same proper name combined with the equivalent geochronologic term, e.g., Cretaceous System - Cretaceous Period. 

Vsmith (talk) 23:51, 21 February 2012 (UTC)


 * As you can see here, the ICS has been only half successful in changing the traditional lower-case usage. Per MOS:CAPS, WP style is to prefer lower case when the capitalization in sources is this inconsistent.  See also WP:SSF.  Can we roll these changes back now, please?  Dicklyon (talk) 02:41, 16 March 2012 (UTC)

Middle Paleozoic?
This article uses the term Middle Paleozoic but doesn't say when it was. Zyxwv99 (talk) 22:10, 19 July 2015 (UTC)


 * It mainly uses the informal term "middle Paleozoic" and goes on to mention the Silurian and the Devonian, so that's the period of time being discussed. There is no formal subdivision of the Paleozoic called the "Middle Paleozoic". The article also uses the terms "early Paleozoic" and "late Paleozoic", but these are equally informal. It would be preferable to rewrite that section without using those terms, in my view. Mikenorton (talk) 16:45, 21 July 2015 (UTC)
 * Thanks! Changing it to lower case is an improvement. Zyxwv99 (talk) 21:45, 21 July 2015 (UTC)

Ordovician
The Ordovician-Silurian extinction event is stated to be the first mass extinction however the Great Oxygenation Event was a mass extinction and it occurred before the Ordovician-Silurian Extinction. — Preceding unsigned comment added by Little Crums (talk • contribs) 00:41, 3 July 2018 (UTC)