Editing Gneiss (section)

===Examples===
<!-- This is not a comprehensive list of gneisses. Include only examples that have something particularly notable about them or that show the global occurrence of gneiss. -->

* The [[Acasta Gneiss]] is found in the [[Northwest Territories]], [[Canada]], on an island about {{convert|300|km||sp=us}} north of [[Yellowknife]]. This is one of the most ancient intact crustal fragments on Earth, metamorphosed 3.58 to 4.031 billion years ago.<ref>[http://www2.ess.ucla.edu/~schauble/Isotope_geochemistry/Acasta_Concordia_Bowring.pdf Bowring, S.A., and Williams, I.S., 1999. Priscoan (4.00–4.03 Ga) orthogneisses from northwestern Canada. Contributions to Mineralogy and Petrology, v. 134, 3–16]</ref>
*The [[Lewisian complex|Lewisian gneiss]] is found throughout the [[Outer Hebrides]] of Scotland, on the Scottish mainland west of the [[Moine Thrust Belt|Moine Thrust]], and on the islands of [[Coll]] and [[Tiree]].<ref>{{cite book |last1=Gillen |first1=Con |title=Geology and landscapes of Scotland |date=2003 |publisher=Terra |location=Harpenden |isbn=1-903544-09-2|page=44}}</ref> These rocks are largely igneous in origin, mixed with metamorphosed [[marble]], quartzite and mica schist with later intrusions of [[basaltic]] [[Dike (geology)|dikes]] and granite magma.<ref>{{cite book |last1=McKirdy |first1=Alan |title=Land of mountain and flood : the geology and landforms of Scotland |date=2007 |publisher=Birlinn |location=Edinburgh |isbn=978-1-84158-357-0|page=95}}</ref>
*The [[Morton Gneiss]] is an Archean-age gneiss exposed in the [[Minnesota River]] Valley of southwestern [[Minnesota]], United States.  It is thought to be the oldest intact block of continental crust in the United States.<ref name=Aber>{{cite web |last=Aber |first=James S. |title=Morton Gneiss, Minnesota |url=http://academic.emporia.edu/aberjame/tectonic/morton_gneiss/morton.htm |publisher=Emporia State University |year=2012 |accessdate=2019-05-22 |archive-date=2014-11-26 |archive-url=https://web.archive.org/web/20141126003847/http://academic.emporia.edu/aberjame/tectonic/morton_gneiss/morton.htm |url-status=dead }}</ref>
* The [[Peninsular Gneiss]] is a sequence of Archean gneisses found throughout the [[Indian Shield]] and ranging in age from 3400 to 2500 million years old.<ref name=monument>{{cite web|url=http://www.portal.gsi.gov.in/portal/page?_pageid=127,529567&_dad=portal&_schema=PORTAL|title=Peninsular Gneiss|publisher=Geological Survey of India|accessdate=2009-02-27|archive-url=https://web.archive.org/web/20110721161351/http://www.portal.gsi.gov.in/portal/page?_pageid=127,529567&_dad=portal&_schema=PORTAL|archive-date=21 July 2011|url-status=dead}}</ref><ref name= GSI>{{cite journal |title=National Geological Monuments, pages 96, Peninsular Gneiss, page29-32|journal=Special Publication Series|publisher=Geological Survey of India,27, Jawaharlal Nehru Road, Kolkata-700016|issn=0254-0436|year=2001|url=http://www.vedamsbooks.com/no24484.htm
}}</ref>