The Medina 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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Medina’s center stands about 400 ft above sea level. Within three miles the land runs from 280 ft to 490 ft, a difference of 210 ft: rolling country. The highest named summit within 15 miles is Mogotes Hill, about 560 ft, 13 miles north-northeast.
Under the town center the state geologic map shows Laredo Formation (sandstone, claystone), from the Eocene, 34 to 56 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.
Sand. Age: Holocene, less than 12,000 years old. About 10 mi of the line.
Sandstone, claystone. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Clay. Age: Late Eocene to Early Oligocene, 28 to 38 million years old. About 1 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 Medina reaches the Gulf of America by way of Paz Ramirez Lake and the Rio Grande: about 310 river miles.
Lake on the way: Paz Ramirez Lake.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Medina; river miles along the main stem, rounded.
