The Mar-Mac 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.
Sunny
Sunny; warmer
Sunny
Sunny
Sunny
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Mostly sunny
87° on Nov. 15, 1993, the hottest reading for this week of the year since 1900. Next is 84° in 1955.
Mar-Mac’s center stands about 140 ft above sea level. Within three miles the land runs from 60 ft to 210 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Black Creek Formation (clay, sand), from the Cretaceous, 66 to 145 million years old.
The section below crosses 3 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.
Clay, sand. Age: Cretaceous, 66 to 145 million years old. About 16 mi of the line.
Sandstone, mudstone. Age: Cretaceous, 66 to 145 million years old. About 7 mi of the line.
Metadacite, metarhyolite, metavolcanic. Age: Neoproterozoic to Cambrian, 487 to 1,000 million 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.
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 Mar-Mac reaches Pamlico Sound and the Atlantic Ocean by way of the Neuse: about 140 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mar-Mac; river miles along the main stem, rounded.
Mar-Mac has a humid subtropical climate. Summer afternoons average 91° in July; winter nights fall to about 34° in January. About 52 inches of rain fall in a normal year, with about 2 inches of snow.
On November 14 Mar-Mac normally reaches 66° and falls to 44°. The record high is 84°, in 1955; the record low 23°, in 1976. The most rain on this date, 1.11 in, fell in 1945.
Normals 1991–2020 and records since 1900 at Goldsboro Seymour Johnson Afb, 5 miles east. NOAA, through RCC-ACIS.
