What is Jaspillite?
[[File:BIF (jaspilite meta-BIF, Paleoproterozoic Minas Gerais.jpg|thumb|Jaspilite sample from [[Minas Gerais]], Brazil]] [[File:Canada geological map.JPG|thumb|Map of the Canadian Shield (the shades of red) in parts of Canada and the Northern United States]] '''Jaspillite''', or ''jaspilite'', is a chemical rock formed similar to [[chert]]. It is usually [[iron]] rich. It also has the name ''jasper [[taconite]]''. Jaspillite is typically a layered mixture of [[hematite]] and [[quartz]]. It is common in the [[banded iron formation]] rocks of [[Proterozoic]] and [[Archean|Archaean]] age in the Canadian shield of [[North America]]. Jaspillite is also a [[sedimentary rock]].in certain [[lead]]-[[zinc]] [[ore]] deposits. It is used as a gemstone.<ref>Gemstones of North America - Volume 1, John Sinkankas - 1959 p.345</ref> == References == {{Reflist}} == Other websites == *[http://www.mindat.org/min-26407.html Mindat.org data] [[Category:Sedimentary rocks]] [[Category:Gemstones]]