The Fisher 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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Fisher’s center stands about 390 ft above sea level. Within three miles the land runs from 270 ft to 450 ft, a difference of 180 ft: gently rolling country.
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 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, clay. Age: Eocene, 34 to 56 million years old. About 10 mi of the line.
Clay, marl. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Clay, silt, sand. Age: Eocene, 34 to 56 million years old. About 4 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 3 mi of the line.
Sand, clay, lignite. Age: Paleocene, 56 to 66 million years old. About 0.5 mi of the line.
Clay, silt. Age: Eocene, 34 to 56 million years old. About 0.4 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 Fisher reaches the Gulf of America by way of Midkiff Creek, the Bayou Toro and the Sabine: about 200 river miles.
Lake on the way: Sabine Lake.
140 miles of the trip are on the Sabine.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Fisher; river miles along the main stem, rounded.
