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Terrestrial stratigraphy
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Keywords: archaeology, archeology, background, bed, brittle, earth, earthquake, formation, fractured, geological, geology, geomorphology, ground, layer, minerals, nature, pattern, planet, rock, sand, sandstone, sediment, sedimentalogical, sedimentary, sedimentology, stratification, stratigraphic, stratigraphy, stratum, structural, surface, terrestrial