The Amazonia 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.
Partly cloudy
Partly cloudy; warmer
Sunny
Mostly sunny
Partly cloudy
Partly cloudy
Chance of showers
82° on Nov. 13, 1999, the hottest reading for this week of the year since 1897. Next is 78° in 1949.
Amazonia’s center stands about 860 ft above sea level. Within three miles the land runs from 800 ft to 1,090 ft, a difference of 290 ft: rolling country. The highest named summit within 15 miles is Lookout Mountain, about 1,190 ft, 15 miles west.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 56×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Limestone, shale. Age: Carboniferous, 299 to 324 million years old. About 11 mi of the line.
Silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 6 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Limestone, shale. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.
Shale, sandstone. Age: Carboniferous, 299 to 324 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. 1 smaller unit 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 Amazonia reaches the Gulf of America by way of Mace Creek, the Missouri and the Mississippi: about 1,620 river miles.
1,170 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Amazonia; river miles along the main stem, rounded.
Amazonia has a hot-summer humid continental climate. Summer afternoons average 88° in July; winter nights fall to about 17° in January. About 35 inches of rain fall in a normal year.
On November 14 Amazonia normally reaches 54° and falls to 31°. The record high is 77°, in 1964; the record low 5°, in 1940. The most rain on this date, 1.44 in, fell in 1931.
Normals 1991–2020 and records since 1897 at St Joseph Rosecrans Memorial Airport, 8 miles south. NOAA, through RCC-ACIS.
