Editing Variolite (section)

==Varieties and occurrence==
The variety of mafic igneous rocks that contain varioles are, with rare exceptions, no longer classified as ''variolites'', which is not recommended for usage. Instead, they are designated using the modifier '''variolitic''' in conjunction with the major [[lithology]]. The major varieties of ''variolites'' are variolitic basalts, variolitic pillow lavas and variolitic komatiites.<ref name="NeuendorfOthers2005a"/><ref name="MaitreOthers2005a"/> Variolitic pillow lavas, that have been previously identified as ''variolites'' and also classified as [[spilite]]s, are found in the Durance, [[France]]; on Mont Genvre, France; in [[Devonian]] rocks of [[Germany]]; and as cobbles on the beaches of the [[Strait of Juan de Fuca]] along the northern edge of the [[Olympic Peninsula]].<ref name="Lewis1914a">Lewis, J.V.  (1914) ''Origin of Pillow Lava.'' Bulletin of the Geological Society of America. vol. 25, pp. 15-25.</ref><ref name="SnavelyOthers1973a">Snavely, P.D., Maceod, N.S., and Holly, C.W. (1973) ''Miocene tholeiitic basalts of coastal Oregon and Washington and their relations to coeval basalts of the Columbia Plateau.'' Geological Society of America Bulletin. vol. 84, pp. 387–424</ref> Variolitic basalts and variolitic komatiites occur commonly as [[Archean]] lava flows in the [[greenstone belt]]s of South Africa and the [[Canadian Shield]].<ref name="SandstaOthers2011a"/><ref name="FowlerOthers1987a"/> Finally, there is a group of spotted volcanic rocks formerly known to [[France|French]] petrographers as the ''variolites du Drac'' from the locality in which they are found in [[Parc National des Ecrins]], France.<ref name="EB1911">{{Cite EB1911|wstitle=Variolites|volume=27|page=921}}</ref>  Additional research has found them to be [[hydrothermal]]ly altered basalt volcanic rocks that contain [[amygdule]]s filled with white [[calcite]] and other secondary minerals.<ref name="Buffet-Croix-Blanche1989a">Buffet-Croix-Blanche, G. (1989) ''Volcans fossiles dans la region du parc national des Ecrins; sept excursions pour une initiation volcanologique sur des lambeaux de volcans dates de 200 millions d'années.'' Parc National des Ecrins, France. 73 p.</ref>