The Madill 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.
Chance of showers
Showers likely; cooler
Chance of showers; warmer
Sunny
Chance of showers
Partly cloudy
Chance of showers
Madill’s center stands about 810 ft above sea level. Within three miles the land runs from 700 ft to 920 ft, a difference of 220 ft: rolling country.
The section below crosses 6 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 7 mi of the line.
Limestone. Age: Early Cretaceous, 100 to 145 million years old. About 7 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Claystone. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Shale. Age: Early Cretaceous, 100 to 145 million years old. About 2 mi of the line.
Limestone, shale, marlstone. Age: Early Cretaceous, 100 to 145 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.
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 Madill reaches the Gulf of America by way of Glasses Creek, the Washita, the Red River, the Atchafalaya and the Lower Atchafalaya: about 840 river miles.
680 miles of the trip are on the Red River.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Madill; river miles along the main stem, rounded.
