Waxahatchee Slate of Kahatchee Mountain Group is here subdivided into newly named Buxahatchee Creek Member and overlying Long Branch Sandstone Member. Dominant rock types in the Long Branch are dark-gray to dark-green micaceous feldspathic very fine grained sandstone interlayered with siltstone. Sandstone in the upper part is calcareous. White mica is common. Other detrital minerals include feldspar, biotite, and zircon. Parallel bedding is well-defined and commonly less than 1 cm thick. Thickness is 2,494 ft. Underlies the Sawyer Limestone Member of the Brewer Phyllite. Age of the Waxahatchee and its members is shown as late Precambrian(?).

Source: GNU records (USGS DDS-6; Reston GNULEX).