The Chilili 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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Chilili’s center stands about 6,810 ft above sea level. Within three miles the land runs from 6,560 ft to 7,430 ft, a difference of 870 ft: hilly country. The highest named summit within 15 miles is Bosque Peak, about 9,620 ft, 14 miles southwest.
Under the town center the state geologic map shows Madera Group (limestone, sandstone, shale), from the Carboniferous, 299 to 324 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 9×. 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 14 mi of the line.
Unconsolidated. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 mi of the line.
Granitic, gneiss. Age: Paleoproterozoic, 1.6 to 1.7 billion years old. About 2 mi of the line.
Unconsolidated. Age: Holocene, less than 12,000 years old. About 0.9 mi of the line.
Pelitic-schist, muscovite-schist, quartzite. Age: Paleoproterozoic, 1.6 to 2.5 billion 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 Chilili reaches the desert basins of the Rio Grande country by way of the Arroyo de Chilili: about 20 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.
Often dry. About 100% of the way is mapped as streams that run only after rain or snowmelt; the water makes the whole trip in floods.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Chilili; river miles along the main stem, rounded.
