Gastrochaenid and lithophagid macroborings in a spongiomorphid.
Scleractinian corals are the dominant bioconstructor in all five buildups at Mina
Updated with detailed information from ref. 2850.
The small patch reefs (~ 20-40 m high and ~ 50-150 m wide, obvious metre-scale elevation above the surrounding sediments) are from the Luning Allochthon and grew on an inner to middle ramp or in a deep lagoon. 
Five coral buildups contained within the lower member of the Upper Triassic Luning Formation located due east of Mina, Nevada, in Cinnabar Canyon (~ N 38°22.677´, W 117°58.248´) and Dunlop Canyon (~ N 38°24.038´, W 118°00.799´). 