e/Spavinaw terrane

Information
has gloss	eng: The Spavinaw terrane is an occurrence of Proterozoic (1.40–1.35 Ga) intrusive and volcanic rocks in the mid-continent region of the United States. The terrane extends across southern Missouri, southern Kansas, northern Arkansas and much of Oklahoma. The rocks are almost entirely known from drill core and only exposed in outcrop near Spavinaw, Mayes County, Oklahoma and parts of the Saint Francois Mountains in Washington County, Missouri. The terrane is composed almost exclusively of essentially unaltered intrusive granites and volcanic rhyolite and rhyolite tuffs.
lexicalization	eng: Spavinaw terrane
instance of	(noun) from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms Proterozoic, Proterozoic eon, Proterozoic aeon