The Grayville 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.
Sunny
Mostly sunny; warmer
Mostly sunny
Partly cloudy
Mostly sunny
Mostly sunny
Mostly sunny
Grayville’s center stands about 440 ft above sea level. Within three miles the land runs from 360 ft to 510 ft, a difference of 150 ft: gently rolling country. The highest named summit within 15 miles is Boyd Hill, about 610 ft, 11 miles west-southwest.
Under the town center the state geologic map shows Mattoon Formation (shale), from the Late Pennsylvanian, 304 to 307 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale. Age: Late Pennsylvanian, 304 to 307 million years old. About 14 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 8 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 3 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 Grayville reaches the Gulf of America by way of Bonpas Creek, the Wabash River Old Channel, the Old Channel Wabash, the Ohio and the Mississippi: about 1,170 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Grayville; river miles along the main stem, rounded.
