Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,897,369,432 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

Archean
(redirected from Archaen)

   Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
Archean [är′kē·ən]
(geology)
A term, meaning ancient, which has been applied to the oldest rocks of the Precambrian; as more physical measurements of geologic time are made, the usage is changing; the term Early Precambrian is preferred.


Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Feedback
Mentioned in?  References in periodicals archive?   Encyclopedia browser?   Full browser?
No references found
 
The gold occurs in fracture controlled quartz vein stockworks with minor fine pyrite in variably altered, foliated Archaen granitoids and mafic dikes, making it amenable to open-pit mining, especially given strong gold prices.
The Coolgardie Goldfield is Archaen aged and situated at the western margin of the Norseman-Wiluna Belt within the Yilgarn Craton and comprises an arcuate belt of deformed, amphibolite grade mafic, ultramafic, felsic and sedimentary rocks bounded to the east by syntectonic monzogranite.
Bedrock consisting of Archaen sedimentary and igneous rocks underlies the area of the fourth anomaly.
 
 
 
Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Advertise with Us | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.