The Seven Points 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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Seven Points’s center stands about 390 ft above sea level. Within three miles the land runs from 310 ft to 410 ft, a difference of 100 ft: gently rolling country.
Under the town center the state geologic map shows Wills Point Formation (clay), from the Paleocene, 56 to 66 million years old.
The section below crosses 5 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.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 mi of the line.
Clay. Age: Paleocene, 56 to 66 million years old. About 6 mi of the line.
Clay, sand. Age: Paleocene, 56 to 66 million years old. About 1 mi of the line.
Clay. Age: Late Cretaceous, 66 to 72 million years old. About 0.9 mi of the line.
Sandstone. Age: Late Cretaceous, 66 to 72 million years old. About 0.6 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 Seven Points reaches Galveston Bay and the Gulf of America by way of Persimmon Branch, Cedar Creek and the Trinity: about 360 river miles.
Lakes on the way: Woodlands Golf Course Lake and Cedar Creek Reservoir.
150 miles of the trip are on the Trinity.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Seven Points; river miles along the main stem, rounded.
