WAlcântara Formation
WAngostura Colorada Formation
WAsencio Formation
WBauru Group
WCajones Formation
WCasma Group
WCerro Fortaleza Formation
WChaunaca Formation
WChipaque Formation
WChota Formation
WColi Toro Member
WColorado Formation, Argentina
WConejo Formation
WDorotea Formation
WEl Molino Formation
WLa Frontera Formation
WGoio-Erê Formation
WGuadalupe Group
WGuaduas Formation
WHiló Formation
WHondita Formation
WHornitos Formation
WItajaí-Açu Formation
WItapecuru Formation
WJuréia Formation
WLa Colonia Formation
WLago Colhué Huapí Formation
WLaguna Palacios Formation
WLefipán Formation
WLisandro Formation
WLoma Gorda Formation
WLos Bastos Formation
WLos Blanquitos Formation
WLos Llanos Formation
WMalargüe Group
WMata Amarilla Formation
WMercedes Formation, Uruguay
WNeuquén Group
WOliní Group
WPacho Formation
WPaso del Sapo Formation
WPlottier Formation
WPresidente Prudente Formation
WPuerto Yeruá Formation
WRío Colorado Subgroup
WRío Limay Subgroup
WRío Limay Subgroup
WRío Neuquén Subgroup
WSanta Lucía Formation
WSantos Formation
WSierra Barrosa Formation
WSimijaca Formation
WToro Toro Formation
WUberaba Formation
WUne Formation
WVilleta Group
WVilquechico Formation
WYacoraite Formation