The Searchlight 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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Searchlight’s center stands about 3,550 ft above sea level. Within three miles the land runs from 3,210 ft to 3,970 ft, a difference of 760 ft: hilly country. The highest named summit within 15 miles is Crescent Peak, about 5,940 ft, 12 miles west.
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 5×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Coarse-detrital, fine-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 14 mi of the line.
Gneiss, schist. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 8 mi of the line.
Gravel, sand. Age: Pliocene to Pleistocene, less than 5.3 million years old. About 2 mi of the line.
Andesite, dacite. Age: Miocene, 5.3 to 23 million years old. About 0.4 mi of the line.
Age: Eocene to Miocene, 5.3 to 56 million years old. About 0.4 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.
