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| thin, distinctive stratum useful for stratigraphic correlation |
| single bed of sedimentary rock, consisting of one kind of matter representing continuous deposition |
| laterite (lāt'ə-rīt') Pronunciation Key
A red, porous, claylike soil formed by the leaching of silica-rich components and enrichment of aluminum and iron hydroxides. They are especially common in humid climates. Laterites that are poor in iron oxides and rich in aluminum oxides are called bauxites. Also called latosol. See more at bauxite. |