naachtun archaeological site and archeology work in guatemala

analysis archaeological archaeologists archaeology archeology architecture artifacts basin biofacts biological biosphere calakmul civilization cultural culture day department dos ecofacts guatemala human humanities jungle lagoons lagunas landscapes lowlands material maya mayan mayanist mirador modern modernday morley naachtun northeastern northern now perimeter peten precolumbian preserve record recovery region reserve science site situated social southern sylvanus tikal trail two work