|Geologic age||Phanerozoic | Paleozoic| Ordovician-Late|
|Comments||Very coarse-grained, yellowish- to lt-brownish-gray or almost white, mostly fossil debris enlarged by calcite, producing grains up to 5 mm in size, fossils include stromatoporoids, corals, brachiopods, bryozoa, cephalopods, pelecypods, and trilobites; crops out on R.M. Burnam Ranch along Burnam Branch and vicinity 4.7 mi airline S-SE of Marble Falls. Small outcrop marked with a x on the state geologic map.|
|Primary rock type||limestone|
|Secondary rock type|
|Other rock types|
Sedimentary > Carbonate > Limestone (Bed)contains pale yellowish-orange stylolites and angular to rounded pebbles and blebs of fine-grained yellowish-gray to peralr-gray limestone; thickness unknown; outcrops are collapsed into older rocks
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
Wilmarth, M.G., 1938, Lexicon of geologic names of the United States: U.S. Geological Survey Bulletin 896, 2396 p.