Modifiers matching rock:

• large,
• crumbly,
• sedimentary,
• hard,
• extraterrestrial,
• volcanic,
• metamorphic,
• hardest,
• smooth,
• friable,
• igneous,
• marine,
• nonporous,
• loose,
• colorful,
• crustal,
• unstable,
• heavier,
• impenetrable,
• russian,
• sharp,
• geologic,
• crystalline,
• glassy,
• british,
• porous,
• solid,
• exotic,
• plutonic,
• permeable,
• homogeneous,
• intrusive,
• soft,
• crushed,
• unusual,
• massive,
• deleterious,
• widespread,
• fine,
• heterogeneous,
• virgin,
• common,
• basic,
• normal,
• weaker,
• bituminous,
• refractive,
• looking,
• combustible,
• flat,
• magnetic,
• ordinary,
• egyptian,
• natural,
• native,
• harder,
• lightweight,
• salt,
• coarse,
• rough,
• argillaceous,
• suitable,
• covered,
• subsurface,
• powdered,
• ingenious,
• durable,
• size,
• abrasive,
• siliceous,
• ductile,
• precious,
• dense,
• soluble,
• impermeable,
• softer,
• pulverized,
• inappropriate,
• visible,
• extrusive,
• polished,
• chemical,
• light,
• aluminous,
• metallic,
• consolidated,
• ornamental,
• decorative,
• reactive,
• organic,
• compact,
• coloured,
• indigenous,
• rigid,
• free,
• primary,
• industrial,
• dated,
• strong,
• lighter,
• planetary,
• abundant,
• calcareous,
• enough,
• acidic,
• artificial,
• resistant,
• dry,
• weak,
• textured,
• intermediate,
• inert,
• stronger,
• stable,
• isolated,
• vitreous,
• traditional,
• elastic,
• anisotropic,
• conductive,
• firm,
• new,
• older,
• noble,
• modern,
• available,
• surrounding,
• local,
• non-porous,
• reflective,
• clastic,
• difficult,
• tough,
• barren,
• rich,
• angular,
• base,
• terrestrial,
• brittle,
• competent,
• opaque,
• colored,
• granular,
• original,
• useful,
• heated,
• frozen,
• typical,
• azonic,
• red,
• molten,
• carbonaceous,
• impervious,
• insoluble,
• dark,
• uniform,
• related,
• smaller,
• alkaline,
• simple,
• white,
• fragile,
• flying,
• acid,
• polycrystalline,
• spherical,
• sticky,
• unconsolidated,
• eruptive,
• small,
• refractory,
• korean,
• hot,
• good,
• geological,
• underlying,
• fragmented,
• polyphase,
• flinty,
• sedentary,
• heavy,
• tight,

Simple categories matching subsurface:

• material,
• change,
• structure,
• platform,
• data,
• installation,
• item,
• property,
• reservoir,
• layer,
• excavation,
• object,
• feature,
• utility,
• condition,
• body,
• liquid,
• attribute,
• measure,
• facility,
• system,
• obstruction,
• component,
• drain,
• stratum,
• process,
• void,
• separation,
• anomaly,
• fluid,
• area,
• quantity,
• mineral,
• detail,
• information,
• artifact,
• cavity,
• defect,
• resource,
• variation,
• variable,
• deposit,
• construction,
• rock,
• industry,
• soil,
• sorbent,
• imperfection,
• formation,