The Laytonville 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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Laytonville’s center stands about 1,660 ft above sea level. Within three miles the land runs from 1,550 ft to 3,180 ft, a difference of 1,630 ft: steep hill country. The highest named summit within 15 miles is Brushy Mountain, about 4,850 ft, 14 miles east-southeast.
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 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sandstone, mudstone. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 11 mi of the line.
Sandstone, mudstone. Age: Late Cretaceous to Pliocene, 2.6 to 100 million years old. About 7 mi of the line.
Melange. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 4 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 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.
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 Laytonville reaches the Pacific Ocean by way of Tenmile Creek, the South Fork Eel and the Eel: about 140 river miles.
80 miles of the trip are on the South Fork Eel.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Laytonville; river miles along the main stem, rounded.
