|Geologic age||Phanerozoic | Paleozoic | Silurian|
|Comments||outcrop so small that on state map it is marked by a cross at a point. Medium-to coarse-grained, massive, pinkish-gray, locally brecciated; probably in a collapse structure, crops out in an area about 50 ft across, because exposures are discontinuous owing to soil cover, neither top, bottom, nor meaningful estimate of thickness can be given; type locality4,000 ft south-southeast of Max Starke Dam, another small outcrop on R.M Burnam Ranch 4.75 mi airline south-southeast of Marble Falls.|
|Primary rock type||limestone|
|Secondary rock type||sedimentary breccia|
|Other rock types|
Sedimentary > Carbonate > Limestone (Bed)
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
Bureau of Economic Geology, 1981, Llano sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.