WAgardhfjellet Formation
WAntenor Navarro Formation
WArcabuco Formation
WAreado Group
WAshdown Formation
WBajada Colorada Formation
WBaños del Flaco Formation
WBazhenov Formation
WBhuj Formation
WBückeberg Formation
WBudden Canyon Formation
WChacarilla Formation
WChon Aike Formation
WGuavio Formation
WÖösh Formation
WIouaridène Formation
WJydegaard Formation
WKimmeridge Clay
WKirkwood Formation
WKiyosu-e Formation
WKsar Metlili Formation
WLa Pedrera de Rúbies Formation
WLulworth Formation
WMacanal Formation
WMjølnir crater
WMorro Solar Group
WNeocomian Sands
WObernkirchen Sandstein
WPhra Wihan Formation
WPhu Kradung Formation
WPiedrahita de Muñó Formation
WRabekke Formation
WRio Piranhas Formation
WRobbedale Formation
WRupelo Formation
WSchrambach Formation
WSousa Formation
WSpeeton Clay Formation
WTera Group
WTuchengzi Formation
WVaca Muerta
WWealden Group
WZapata Formation