Motagua River
This is true also for the Obsidian, transported from the El Chayal ( north from Kaminaljuyú), San Martín Jilotepeque and from the Ixtepeque quarries, using a river that confluences with the Motagua River, then it was transported from the Caribbean shores, using the Río Azul, Holmul River (Guatemala), and the Mopan River systems, to distribute it to the major centers in Petén.