Fusselman Dolomite (TXSf;0)

State	Texas
Name	Fusselman Dolomite
Geologic age	Phanerozoic \| Paleozoic \| Silurian
Original map label	Sf
Comments	(from Van Horn-El Paso Sheet, 1968) Dolomite, dolomitic limestone, and locally limestone, aphanitic to coarse grained, thick to very thick bedded, massive, white to lt. gray, some beds medium dk. gray; marine fossils in a few ls. beds. Thickness--Frinklin Mountains, 600-900+ ft; Hueco Mtns. 630+ ft; Sierra Diablo and Baylor Mtns, 300-450 ft (from Richardson, 1908) outcrops in El Paso Co. in Orogrande Basin. Massive whitish magneisum limestone approx. 1,000 ft thick. Overlies Montoya Limestone. Fossils generally scarce throughout formation, but at a few horizons are vey abundant. Most common is species of radially plicated pentameroid shell which, with Amplexus and Favosites proves that the upper Niagaran stage is represented.
Primary rock type	dolostone (dolomite)
Secondary rock type	limestone
Other rock types
Lithologic constituents	Major Sedimentary > Carbonate > Dolostone (Bed)some dolomitic limestone present Minor Sedimentary > Carbonate > Limestone (Bed)
Map references	Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Unit references	Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, scale 1:250,000. Richardson, G.B., 1908, Paleozoic formations in Trans-Pecos Texas: American Journal of Science, 4th series, v. 25, art. 49, p. 474-484.
Geographic coverage	Culberson - El Paso - Hudspeth