The Indian Hills 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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Indian Hills’s center stands about 6,460 ft above sea level. Within three miles the land runs from 6,240 ft to 6,910 ft, a difference of 670 ft: hilly country. The highest named summit within 15 miles is South Mountain, about 8,740 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Piedmont alluvial deposits (unconsolidated), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 13×. 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, sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 11 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 9 mi of the line.
Unconsolidated. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 0.1 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 Indian Hills reaches the desert basins of the Rio Grande country by way of the Arroyo de Chilili: about 7 river miles. The desert basins of the Rio Grande country has no outlet to the sea: the water leaves only by evaporating or soaking into the ground.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Indian Hills; river miles along the main stem, rounded.
