The Eastland 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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Eastland’s center stands about 1,440 ft above sea level. Within three miles the land runs from 1,420 ft to 1,560 ft, a difference of 140 ft: gently rolling country. The highest named summit within 15 miles is Gunsight Mountain, about 1,650 ft, 8 miles north-northwest.
Under the town center the state geologic map shows Thrifty and Graham Formations, undivided (black-shale), from the Carboniferous, 299 to 324 million years old.
The section below crosses 10 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 61×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Black-shale. Age: Carboniferous, 299 to 324 million years old. About 10 mi of the line.
Siltstone-mudstone. Age: Carboniferous to Permian, 252 to 324 million years old. About 3 mi of the line.
Black-shale. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Black-shale, limestone. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Black-shale. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 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. 4 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 Eastland reaches the Gulf of America by way of the Leon, the Little River and the Brazos: about 700 river miles.
Lakes on the way: Belton Lake and Proctor Lake.
320 miles of the trip are on the Brazos.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Eastland; river miles along the main stem, rounded.
