The East Lexington 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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East Lexington’s center stands about 960 ft above sea level. Within three miles the land runs from 890 ft to 1,460 ft, a difference of 570 ft: hilly country. The highest named summit within 15 miles is Pompey Mountain, about 4,040 ft, 14 miles east.
Under the town center the state geologic map shows Edinburg Formation, Lincolnshire and New Market Limestones, from the Ordovician, 445 to 487 million years old.
The section below crosses 14 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone. Age: Ordovician, 445 to 487 million years old. About 4 mi of the line.
Shale, sandstone. Age: Ordovician, 445 to 487 million years old. About 4 mi of the line.
Quartzite, conglomerate, sandstone. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Dolostone, limestone. Age: Ordovician, 445 to 487 million years old. About 3 mi of the line.
Granulite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.
Limestone. Age: Cambrian to Ordovician, 445 to 542 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. 8 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 East Lexington reaches Chesapeake Bay and the Atlantic Ocean by way of the Maury and the James: about 300 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of East Lexington; river miles along the main stem, rounded.
