The Mogollon plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Mogollon’s center stands about 6,720 ft above sea level. Within three miles the land runs from 5,410 ft to 8,490 ft, a difference of 3,080 ft: mountain country. The highest named summit within 15 miles is Whitewater Baldy, about 10,880 ft, 10 miles east-southeast.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 3×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Basaltic-andesite, andesite. Age: Late Oligocene to Early Miocene, 22 to 26 million years old. About 9 mi of the line.
Conglomerate-sandstone, volcanic. Age: Late Oligocene to Pleistocene, 0.1 to 28 million years old. About 9 mi of the line.
Rhyolite. Age: Early Oligocene to Late Oligocene, 24 to 29 million years old. About 3 mi of the line.
Rhyolite. Age: Early Oligocene to Late Oligocene, 24 to 30 million years old. About 2 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 0.1 million years old. About 1 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Mogollon reaches the Gulf of California by way of Silver Creek, Mineral Creek, the San Francisco, the Gila and the Colorado: about 670 river miles.
460 miles of the trip are on the Gila.
Often dry. About 40% of the way is mapped as streams that run only after rain or snowmelt; the water makes the whole trip in floods.
Seldom reaches the sea. Dams and canals now take nearly all of the Colorado before its old delta in Mexico.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mogollon; river miles along the main stem, rounded.
