The Paskenta 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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Paskenta’s center stands about 740 ft above sea level. Within three miles the land runs from 670 ft to 1,420 ft, a difference of 750 ft: hilly country. The highest named summit within 15 miles is Ball Rock, about 6,640 ft, 12 miles west-northwest.
Under the town center the state geologic map shows Quaternary alluvium and marine deposits (coarse-detrital), from the Pleistocene to Holocene, less than 2.6 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 3×. 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, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 10 mi of the line.
Siltstone-mudstone. Age: Late Jurassic to Early Cretaceous, 100 to 164 million years old. About 4 mi of the line.
Mica-schist. Age: Early Cretaceous, 110 to 143 million years old. About 4 mi of the line.
Serpentinite. Age: Middle Jurassic to Late Jurassic, 145 to 175 million years old. About 3 mi of the line.
Siltstone-mudstone. Age: Early Cretaceous, 113 to 145 million years old. About 1 mi of the line.
Greenstone. Age: Jurassic to Cretaceous, 66 to 202 million years old. About 0.9 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 smaller units along the line are not listed.
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 Paskenta reaches San Francisco Bay and the Pacific Ocean by way of Thomes Creek and the Sacramento: about 250 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Paskenta; river miles along the main stem, rounded.
