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Settlement Analysis Overview and Methodology
Anthrosols as Diagnostic Indicators
Major Chemical Episodes in Human History
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abandoned settlement analysis agricultural alterite amount anthrosols appear archaeological areas artificial fields Billar Bogota Calima Cano Carate Cano Viejo Cauca Cauca River Chemical Analysis Cienaga Colombia Cordillera Occidental crop Deltaic Plain Deserted Medieval Villages Diabase Diabase Group ditched fields Dorado Eidt El Dorado factors farm flood forms geofactors Geographical group settlements horizon human activities inorganic phosphate intensive investigation Jol6n laboratory land layers lowlands ment modern mottled northern Colombia occur organic paleosol parent materials periods pH SMP Phosphate Analysis phosphorus planting platform poor drainage ppm ppm pre-Columbian prehistoric Raised field ridge raised fields region residential ring test Rural Settlement San Jorge River San Marcos sediments settlement phosphate Singh slopes soil chemistry soil formation Soil Phosphate Fractions soil sample surface swales Total Phosphate Sample Total Phosphate Trench total phosphate value Tumulos types Valle del Cauca vegetation village volcanic ash water table western Colombia yuca zone