The Maya in the Middle Formative
In the Maya highlands, the key archaeological region has always been the broad, fertile Valley of Guatemala around present-day Guatemala City. The earliest occupation is known as the Arevalo phase, a village culture of the Early to Middle Formative. It was followed by Las Charcas, a Middle Formative culture known largely from the contents of bottle-shaped pits found dug into the subsoil on the western edge of the modern city. Extremely fine ceramics have been excavated from them, including red-on-white bowls with animal figures, effigy vessels, three-footed cups, and peculiar three-pronged incense burners. Solid female figurines are also present.
The earliest Middle Formative cultures of the Maya lowlands are called, collectively, the Xe horizon. They apparently developed from antecedent Early Formative cultures of the Maya lowlands that have been discussed above. The problem of the origin of the Mayan-speaking people has not been solved. It may be that they were Olmec people who had been forced out of their homeland to the west by the collapse of San Lorenzo. There were already peoples in the Maya lowlands in Early Formative times, however, and if the early Maya were Olmec, they brought little of their Olmec culture with them. Another hypothesis is that the earliest Maya descended to their lowland homelands from the Guatemalan highlands.
In the Maya lowlands the Mamom cultures developed out of those of Xe times. Mamom shares many similarities with the highland Maya at Las Charcas: pottery is almost entirely monochrome—red, orange, black, and white—and figurines are female with the usual punched and appliquéd embellishments. Toward the end of the Middle Formative, or after about 600 bce, Mamom peoples began building small ceremonial centres and modest-sized pyramidal platforms.