The Millerton 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.
Millerton’s center stands about 510 ft above sea level. Within three miles the land runs from 370 ft to 520 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Bear Mountain, about 830 ft, 13 miles north-northeast.
Under the town center the state geologic map shows Kiamichi Formation (shale), from the Early Cretaceous, 100 to 145 million years old.
The section below crosses 13 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 48×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone. Age: Early Cretaceous, 100 to 145 million years old. About 5 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 3 mi of the line.
Limestone, shale, marlstone. Age: Early Cretaceous, 100 to 145 million years old. About 3 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 7 smaller units along the line are not listed.
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 Millerton reaches the Gulf of America by way of Buzzard Creek, the Red River, the Atchafalaya and the Lower Atchafalaya: about 680 river miles.
530 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Millerton; river miles along the main stem, rounded.