Mexican President Felipe Calderon inaugurated the archaeological site of El Coporo, a corner of civilization that flourished between 200 and 900 A.D., located in the central state of Guanajuato.

"El Coporo is a true witness to Mexico's native riches, and explains a lot about who we are, what we believe and what we have experienced," the president said at the inauguration.

The National Institute of Archaeology and History, or INAH, said in a communique that El Coporo developed in the period between 200 and 900 A.D. in an environment very different from the semidesert landscape that it is now.

"Mexico has an impressive culture and cultural wealth, among the richest in the world," Calderon said.

El Coporo is the ninth pre-Columbian site opened during the president's six-year term and the fourth in the state of Guanajuato.

INAH said that unlike other nearby areas associated with the Bajio tradition, this archaeological zone of northwest Guanajuato is linked culturally to the Tunal Grande tradition, which includes settlements in western San Luis Potosi state, southwestern Zacatecas and the Los Altos highlands of Jalisco. EFE