THE ARCHAIC HORIZON 



i:> 



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 considerable changes 

 have taken place in the level of the lake. Bui we must 

 remember that many of the ancient settlements were 



13 





-» "* v ° ~ O 



. 





Temple mounds of Tol- 

 tecaD period. 



Surface finds of Ajztecan 

 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. 



built over the water and that land was made in ancient 

 times, as it is today in the gardens of Xochirnilco, by 

 deepening canal-. Archaic remains are also common on 

 the denuded tops of hills which may once have been 

 covered bv soil. 



