contemporaneous North America, was a large component of the subsistence strategy of the Mesoamerican Paleo-Indian. These sites had obsidian blades and Clovis-style fluted projectile points. Archaic The Archaic period (8000–2000 BCE) is characterized by the rise of incipient agriculture in Mesoamerica. The initial phases of the Archaic involved the cultivation of wild plants, transitioning into informal domestication and culminating with sedentism and agricultural production by the close of the period. Transformations of natural environments have been a common feature at least since the mid Holocene. Archaic sites include Sipacate in Escuintla, Guatemala, where maize pollen samples date to c. 3500 BCE. Preclassic/Formative The first complex civilization to develop in Mesoamerica was that of the Olmec, who inhabited the gulf coast region of Veracruz throughout the Preclassic period. The main sites of the Olmec include San Lorenzo Tenochtitlán, La Venta, and Tres Zapotes. Specific dates vary, but these sites were occupied from roughly 1200 to 400 BCE. Remains of other early cultures interacting with the Olmec have been found at Takalik Abaj, Izapa, and Teopantecuanitlan, and as far south as in Honduras. Research in the Pacific Lowlands of Chiapas and Guatemala suggest that Izapa and the Monte Alto Culture may have preceded the Olmec. Radiocarbon samples associated with various sculptures found at the Late Preclassic site of Izapa suggest a date of between 1800 and 1500 BCE. During the Middle and Late Preclassic period, the Maya civilization developed in the southern Maya highlands and lowlands, and at a few sites in the northern Maya lowlands. The earliest Maya sites coalesced after 1000 BCE, and include Nakbe, El Mirador, and Cerros. Middle to Late Preclassic Maya sites include Kaminaljuyú, Cival, Edzná, Cobá, Lamanai, Komchen, Dzibilchaltun, and San Bartolo, among others. The Preclassic in the central Mexican highlands is represented by such sites as Tlapacoya, Tlatilco, and Cuicuilco. These sites were eventually superseded by Teotihuacán, an important Classic-era site that eventually dominated economic and interaction spheres throughout Mesoamerica. The settlement of Teotihuacan is dated to the later portion of the Late Preclassic, or roughly 50 CE. In the Valley of Oaxaca, San José Mogote represents one of the oldest permanent agricultural villages in the area, and one of the first to use pottery. During the Early and Middle Preclassic, the site developed some of the earliest examples of defensive palisades, ceremonial structures, the use of adobe, and hieroglyphic writing. Also of importance, the