The Boyd 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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Boyd’s center stands about 680 ft above sea level. Within three miles the land runs from 660 ft to 830 ft, a difference of 170 ft: gently rolling country. The highest named summit within 15 miles is Indian Knob, about 1,270 ft, 14 miles southwest.
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 51×. 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 18 mi of the line.
Limestone. Age: Early Cretaceous, 100 to 113 million years old. About 4 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 0.9 mi of the line.
Sandstone, claystone. Age: Early Cretaceous, 100 to 145 million years old. About 0.5 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.3 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 Boyd reaches Galveston Bay and the Gulf of America by way of the West Fork Trinity and the Trinity: about 550 river miles.
Lakes on the way: Woodlands Golf Course Lake, Eagle Mountain Lake and Lake Worth.
270 miles of the trip are on the Trinity.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Boyd; river miles along the main stem, rounded.
