2018 Map of Monument Bluff

About this map

The international boundary between the United States and Mexico cuts diagonally across this desert landscape, separating the arid expanse of the Tule Desert from the volcanic features of the south. This 2018 survey documents a remote transborder region where the Pinacate Lava Flow spreads toward the eastern edge of the map, adjacent to the Pinacate Valley. The distinctive landform of Monument Bluff stands as a prominent topographical marker near the border line, illustrating the stark and specialized geography that characterizes this section of the Sonoran frontier. The lack of settlements or roads on this sheet underscores the isolated nature of the terrain in the early twenty-first century.