The Rockport 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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Partly cloudy; warmer
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6° on Nov. 12, 2019, the coldest reading for this week of the year since 1991. Next is 15° in 2005.
Rockport’s center stands about 450 ft above sea level. Within three miles the land runs from 440 ft to 740 ft, a difference of 300 ft: rolling country. The highest named summit within 15 miles is Long Knob, about 910 ft, 13 miles south.
The section below crosses 12 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 46×. 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. Age: Early Mississippian to Middle Mississippian, 331 to 359 million years old. About 7 mi of the line.
Shale, limestone. Age: Late Ordovician, 445 to 454 million years old. About 3 mi of the line.
Limestone, siltstone. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Limestone, shale. Age: Early Mississippian, 347 to 359 million years old. About 2 mi of the line.
Limestone. Age: Carboniferous, 324 to 359 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Holocene, less than 12,000 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. 6 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 Rockport reaches the Gulf of America by way of the The Sny and the Mississippi: about 1,260 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Rockport; river miles along the main stem, rounded.
Rockport has a hot-summer humid continental climate. Summer afternoons average 88° in July; winter nights fall to about 18° in January. A normal year brings about 16 inches of snow; with the rain, that comes to about 40 inches of water.
Normals 1991–2020 and records since 1991 at Pittsfield No 2, 12 miles east-northeast, 230 ft higher. NOAA, through RCC-ACIS.
