romanechite or psilomelane or psilomelaneromaniteromanzoviteromarchiteromeite or antimony ochre or antimony ochre or atopiteromerite or roemerite or roemerite or louderbackiteromexrondrondorfiterongstockiteronneburgiterontgeniteroofroof boltroof collapse or roof foundering or roof founderingroof controlroof fallroof founderingroof rockroof sagroof stressroof supportroof thrustroof trussesrool markroom and pillarroom and pillar mining or pillar mining or pillar miningroom neckrooseveltiteroot cap or roof bar or roof barroot cast or rhizoconcretion or rhizoconcretionroot levelroot of a volcanoroot of mean square errorroot or roots or rootsroot scar or root zone or root zoneroot sheathroot zone or root zones or root zonesrootless fumarole or fumarole or fumarolerootless ventrootlet bedropakrope drillingropy lava or pahoehoe or pahoehoeroquesiterorisiterosasiteroscheriteroscoeliterose diagram or rose or rose
