saprolite

saprolite
    n 1: a deposit of clay and disintegrating rock that is found in
         its original place
    

41 Moby Thesaurus words for "saprolite":
      aa, abyssal rock, basalt, bedrock, block lava, brash, breccia,
      conglomerate, crag, druid stone, festooned pahoehoe, gneiss,
      granite, igneous rock, lava, limestone, living rock, magma,
      mantlerock, metamorphic rock, monolith, pahoehoe, pillow lava,
      porphyry, pudding stone, regolith, rock, ropy lava, rubble,
      rubblestone, sandstone, sarsen, schist, scoria, scree,
      sedimentary rock, shelly pahoehoe, stone, talus, tufa, tuff