Named Wendover group. These rocks were previously assigned to upper part of Division II of Hartville formation [not used in this report] in earlier reports. Recognized in sections on Broom Creek, near Wendover, Wyoming, and near Hot Springs, South Dakota, on the Chadron arch. Composed mostly of medium dark-gray, massive to bedded, silty limestone that may be fossiliferous and have some red chert seams. Also includes lavender sandy shale, dark-gray to purple, platy to slabby mudstone, and gray, laminated, thin bedded to cross-bedded sandstone. Is 130.5 feet thick near Wendover. Overlies Meek group (new); underlies Broom Creek group (new). Correlated with the Douglas and Shawnee groups of the Virgil series. Age is Pennsylvanian. Report includes measured sections.
Named from exposures in Platte River Valley near Wendover (the type locality), Platte Co., WY, in the Denver basin.

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).