Abstract:The geology of the Bonner quadrangle in western Montana was mapped principally to study the Missoula group of the Belt series, and the structure of the area. The type localities of the formations comprising this group are all in or near the Bonner quadrangle. These formations are here redefined and in part renamed. Like the rest of the Belt series, the Missoula group has been regarded heretofore as of late Precambrian age but in our opinion the results of the present study suggest that its upper part may be of… Show more
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.