The Tyro 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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12° on Nov. 12, 2019, the coldest reading for this week of the year since 1996. Next is 15° in 2018.
Tyro’s center stands about 890 ft above sea level. Within three miles the land runs from 800 ft to 1,000 ft, a difference of 200 ft: gently rolling country.
Under the town center the state geologic map shows Lansing Group (shale, limestone), from the Carboniferous, 299 to 324 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. 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 10 mi of the line.
Shale, limestone. Age: Carboniferous, 299 to 324 million years old. About 6 mi of the line.
Sandstone, shale. Age: Carboniferous, 299 to 324 million years old. About 5 mi of the line.
Fine-detrital. Age: Holocene, less than 12,000 years old. About 2 mi of the line.
Shale, siltstone, sandstone. Age: Carboniferous, 299 to 324 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 Tyro reaches the Gulf of America by way of Hafer Run, Cheyenne Creek, the Little Caney, the Caney, the Verdigris, the Arkansas and the Mississippi: about 1,190 river miles.
Lakes on the way: Murray Lake, Ozark Lake and Copan Lake.
600 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Tyro; river miles along the main stem, rounded.
Tyro has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 24° in January. About 40 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1996 at Coffeyville Municipal Airport, 14 miles east-northeast, 140 ft lower. NOAA, through RCC-ACIS.
