sentences:  Despite archaeological work conducted in the Magdalena Lake Basin by Jose Corona Nunez in the 1950s  and Stanley Long in the 1960s  at the sites of El Arenal and San Sebastian, the guachimontón went unrecognized.Not until 1974 with two publications, one by Phil Weigand and another by Joseph Mountjoy and Weigand, did the guachimonton form gain attention in Mesoamerican studies.Until Weigand’s publication, other Mesoamerican academics characterized West Mexico as a region made of small hamlets with no significant contributions until the Postclassic period and rise of the Kingdom of Tzintzuntzan in present-day Michoacán.