The Osterdock 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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77° on Nov. 13, 1999, the hottest reading for this week of the year since 1937. Next is 72° in 1964.
Osterdock’s center stands about 630 ft above sea level. Within three miles the land runs from 620 ft to 1,110 ft, a difference of 490 ft: hilly country. The highest named summit within 15 miles is Sugar Loaf, about 1,080 ft, 11 miles east-southeast.
Under the town center the state geologic map shows Prairie Du Chien Group and St. Peter Sandstone (dolostone, sandstone), from the Early Ordovician to Late Ordovician, 454 to 487 million years old.
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 31×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, dolostone. Age: Late Ordovician, 447 to 454 million years old. About 11 mi of the line.
Dolostone. Age: Late Ordovician to Silurian, 434 to 447 million years old. About 7 mi of the line.
Dolostone, limestone. Age: Late Ordovician, 447 to 459 million years old. About 5 mi of the line.
Dolostone, sandstone. Age: Early Ordovician to Late Ordovician, 454 to 487 million years old. About 1 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 Osterdock reaches the Gulf of America by way of the Turkey and the Mississippi: about 1,600 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Osterdock; river miles along the main stem, rounded.
Osterdock has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 10° in January. A normal year brings about 34 inches of snow; with the rain, that comes to about 37 inches of water.
On November 14 Osterdock normally reaches 47° and falls to 30°. The record high is 71°, in 1990; the record low 4°, in 1959. The most rain on this date, 0.61 in, fell in 1980.
Normals 1991–2020 and records since 1937 at Guttenberg L And D 10, 5 miles northeast. NOAA, through RCC-ACIS.
