The Pratt 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.
Mostly cloudy
Showers likely
Partly cloudy
Partly cloudy
Mostly sunny
Partly cloudy
Showers likely
Pratt’s center stands about 1,950 ft above sea level. Within three miles the land runs from 1,900 ft to 1,990 ft, a difference of 90 ft: gently rolling country.
Under the town center the state geologic map shows Loess (silt), from the Pleistocene to Holocene, less than 2.6 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 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.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 10 mi of the line.
Silt. Age: Pleistocene to Holocene, less than 2.6 million years old. About 10 mi of the line.
Sand, silt, clay. Age: Pleistocene, less than 2.6 million years old. About 2 mi of the line.
Sand, silt, clay. Age: Pleistocene to Holocene, less than 2.6 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 Pratt reaches the Gulf of America by way of the South Fork Ninnescah, the Ninnescah, the Arkansas and the Mississippi: about 1,430 river miles.
Lakes on the way: Murray Lake and Ozark 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 Pratt; river miles along the main stem, rounded.
