The Hourglass series consists of very deep, well drained soils that formed in slope alluvium derived dominantly from sandstone and limestone, but also from mixed sources.
Hourglass soils are on mountain slopes.
Slopes are 10 to 60 percent. These are the Accola , Amsden , Barbarela , Buffork , Cific , Inchau , Leavitt , Monida , Philipsburg , and Zade series. Hourglass soils are on backslopes, footslopes, and toeslopes of mountains at elevations of 8,000 to 11,500 feet. Slopes are 5 to 60 percent. These soils formed in slope alluvium and colluvium dominantly from sandstone and shale, but also from mixed sources.