The Ramah 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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Ramah’s center stands about 6,120 ft above sea level. Within three miles the land runs from 6,010 ft to 6,420 ft, a difference of 410 ft: hilly country. The highest named summit within 15 miles is Fremont Fort, about 7,050 ft, 13 miles west.
Under the town center the state geologic map shows Denver Fm or lower part of Dawson Arkose (arkose, shale, mudstone), from the Late Cretaceous to Paleocene, 56 to 100 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 17×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Arkose, shale, mudstone. Age: Late Cretaceous to Paleocene, 56 to 100 million years old. About 15 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 6 mi of the line.
Arkose, conglomerate, shale. Age: Paleocene to Eocene, 34 to 66 million years old. About 2 mi of the line.
Sandstone, claystone. Age: Oligocene, 23 to 34 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 Ramah reaches the Gulf of America by way of Big Sandy Creek, the Arkansas and the Mississippi: about 1,880 river miles.
Lakes on the way: Murray Lake and Ozark Lake.
800 miles of the trip are on the Arkansas.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Ramah; river miles along the main stem, rounded.
