Talk:Bright Angel Shale

External links modified
Hello fellow Wikipedians,

I have just modified 2 external links on Bright Angel Shale. 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/20121220094947/http://www.nature.nps.gov/geology/parks/grca/age/index.cfm to http://www2.nature.nps.gov/geology/parks/grca/age/index.cfm
 * Added archive https://web.archive.org/web/20121220094947/http://www.nature.nps.gov/geology/parks/grca/age/index.cfm to http://www2.nature.nps.gov/geology/parks/grca/age/index.cfm

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

Cheers.— InternetArchiveBot  (Report bug) 20:14, 25 July 2017 (UTC)

merge with Bright Angel Shale
USGS doesn't appear to support use of "Bright Angel Formation." USGS does, however, appear to support "Bright Angel Shale" of Tonto Group (AZ*), This article describes the Bright Angel Shale as a member of the Tonto Group (the unit in Arizona). Bright Angel Formation has description being in Arizona. Recommend merging the Formation article into this, the Shale article. See https://ngmdb.usgs.gov/Geolex/Units/BrightAngel_4814.html. Trilotat (talk) 22:59, 11 April 2019 (UTC)

removed the dead "external links"
I replaced the dead anonymous external links with links USGS's Geolex. Trilotat (talk) 16:42, 2 June 2019 (UTC)