The Mayfield 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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Mayfield’s center stands about 860 ft above sea level. Within three miles the land runs from 760 ft to 1,890 ft, a difference of 1,130 ft: steep hill country. The highest named summit within 15 miles is Three Ponds Mountain, about 3,010 ft, 15 miles north-northwest.
Under the town center the state geologic map shows Glacial and Alluvial Deposits (unconsolidated), from the Quaternary, less than 2.6 million years old.
The section below crosses 9 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 10×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Dolostone. Age: Cambrian to Early Ordovician, 471 to 497 million years old. About 6 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Unconsolidated. Age: Quaternary, less than 2.6 million years old. About 5 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 3 mi of the line.
Dolostone, limestone. Age: Early Ordovician, 471 to 487 million years old. About 2 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion 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. 3 smaller units 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 Mayfield reaches New York Harbor and the Atlantic Ocean by way of Great Sacandaga Lake, the Sacandaga and the Hudson: about 260 river miles.
Lake on the way: Great Sacandaga Lake.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mayfield; river miles along the main stem, rounded.
