The Marlin 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.
Chance of showers
Showers likely; cooler
Partly cloudy
Sunny
Partly cloudy
Partly cloudy
Partly cloudy
Marlin’s center stands about 400 ft above sea level. Within three miles the land runs from 330 ft to 470 ft, a difference of 140 ft: gently rolling country.
Under the town center the state geologic map shows Pecan Gap Chalk (limestone, carbonate), from the Late Cretaceous, 66 to 72 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 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, carbonate. Age: Late Cretaceous, 66 to 72 million years old. About 11 mi of the line.
Fine-detrital, coarse-detrital. Age: Holocene, less than 12,000 years old. About 5 mi of the line.
Sand. Age: Pleistocene to Holocene, less than 2.6 million years old. About 5 mi of the line.
Sandstone-mudstone. Age: Late Cretaceous, 66 to 72 million years old. About 1 mi of the line.
Claystone. Age: Late Cretaceous, 66 to 72 million years old. About 1 mi of the line.
Sandstone. Age: Late Cretaceous, 66 to 72 million years old. About 0.8 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 Marlin reaches the Gulf of America by way of Big Creek and the Brazos: about 370 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Marlin; river miles along the main stem, rounded.
