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n. A layer of hard subsoil or clay. Also called caliche.

n. Hard, unbroken ground.

n. A foundation; bedrock.

n. A distinct layer of soil that is largely impervious to water.

n. A dry lake.

adj. the hard stratum of earth lying beneath the soil; hence, figuratively, the firm, substantial, fundamental part or quality of anything; as, the hard pan of character, of a matter in dispute, etc. See Pan.

n. The hard substratum. Same as Hard pan, under hard, a.

n. The more or less firmly consolidated detrital material which sometimes underlies a superficial covering of soil.

n. Hence Hard, unbroken ground.

n. The lowest level; lowest foundation; a firm footing for effort or upward progress: as, prices have reached hard-pan.

n. crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions

"Caliche is also known as hardpan, calcrete, kankar (in India), or duricrust."

dirt    soil   

hard   

fireclay    gelignite    thornbush    onshore    jackhammer    lyddite    Precambrian    rhyolite    boll    schist