. Ancient civilizations of Mexico and Central America. Indians of Mexico; Indians of Central America. 48 MEXICO AND CENTRAL AMERICA At other sites, such as Collmacan, the Toltecan layer is of greater thickness and the archaic layer of lesser thickness. The remains extend below the present level of the water and may indicate that. /s 10 Temple mounds of Tol- tecan period. Surface finds of Az- tecan period. Remains of Toltecan period. Deep stratum of water- bearing gravels contain- ing remains of archaic period. Bed rock of hard clay. Fig. 11. Diagram of Culture Strata at Atzcapotzalco. consider


. Ancient civilizations of Mexico and Central America. Indians of Mexico; Indians of Central America. 48 MEXICO AND CENTRAL AMERICA At other sites, such as Collmacan, the Toltecan layer is of greater thickness and the archaic layer of lesser thickness. The remains extend below the present level of the water and may indicate that. /s 10 Temple mounds of Tol- tecan period. Surface finds of Az- tecan period. Remains of Toltecan period. Deep stratum of water- bearing gravels contain- ing remains of archaic period. Bed rock of hard clay. Fig. 11. Diagram of Culture Strata at Atzcapotzalco. considerable changes have taken place in the level of the lake. But we must remember that many of the ancient settlements were built over the water and that land was made in ancient times, as it is today in the gardens of Xochimilco, by deepening canals. Archaic remains are also common on the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Spinden, Herbert Joseph, 1879-1967. New York : American Museum of Natural History


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