The Bonadelle Ranchos 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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84° on Nov. 11, 1956, the hottest reading for this week of the year since 1928. Next is 84° in 2016.
Bonadelle Ranchos’s center stands about 340 ft above sea level. Within three miles the land runs from 310 ft to 400 ft, a difference of 90 ft: gently rolling country. The highest named summit within 15 miles is Hulbert Mountain, about 1,810 ft, 14 miles east-northeast.
Under the town center the state geologic map shows Older Quaternary alluvium and marine deposits (coarse-detrital), from the Pleistocene, less than 2.6 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 16×. 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. Age: Pleistocene, less than 2.6 million years old. About 8 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 7 mi of the line.
Granodiorite. Age: Permian to Tertiary, 2.6 to 260 million years old. About 6 mi of the line.
Sandstone. Age: Eocene, 34 to 56 million years old. About 2 mi of the line.
Plutonic, gneiss. Age: Paleoproterozoic to Late Cretaceous, 66 to 2,500 million years old. About 1 mi of the line.
Slate, graywacke. Age: Triassic to Late Jurassic, 145 to 252 million years old. About 0.6 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 Bonadelle Ranchos reaches San Francisco Bay and the Pacific Ocean by way of the Eastside Bypass, Sand Slough, Mariposa Slough, the San Joaquin and New York Slough: about 220 river miles.
140 miles of the trip are on the San Joaquin.
Often dry. About 30% 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 Bonadelle Ranchos; river miles along the main stem, rounded.
Bonadelle Ranchos has a cold semi-arid climate. Summer afternoons average 98° in July; winter nights fall to about 38° in December. About 11 inches of rain fall in a normal year.
On November 14 Bonadelle Ranchos normally reaches 67° and falls to 42°. The record high is 79°, in 1948; the record low 26°, in 1938. The most rain on this date, 1.27 in, fell in 1972.
Normals 1991–2020 and records since 1928 from the Madera Area threaded record (Madera Municipal Airport, 12 miles west). NOAA, through RCC-ACIS.
