DescriptionReach A14 is located in Stillwater County, just downstream of Columbus. The reach is a Partially Confined Anabranching (PCA) reach type, reflecting some valley while influence coupled with relatively extensive forested islands. The reach is 7.8 miles long, extending from RM 405.9 to RM 413.7. The partial geologic confinement within Reach A14 is created by interbedded sandstone and shale of the Cretaceous-age Judith River Formation that intermittently forms the active channel margin on either its right or left bank. The Parkman Sandstone, a massive cliff-forming unit within the Judith River Formation, forms cliffs against the channel that are commonly over 150 feet high.TypeTextGenredocumentsLanguageeng Date2016-03-16SubjectRivers--MontanaYellowstone RiverYellowstone River WatershedContributing InstitutionMontana State LibraryGeographic CoverageYellowstone RiverMontanaDigital CollectionYellowstone River Corridor StudyDigital Formatapplication/pdfDigitization SpecificationsBorn PDF documentsCopyrightCC0
