The Martinsville 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
Mostly sunny; warmer
Sunny
Sunny
Mostly sunny
Mostly sunny
Mostly sunny
3° on Nov. 13, 2019, the coldest reading for this week of the year since 1893. Next is 10° in 1986.
Martinsville’s center stands about 610 ft above sea level. Within three miles the land runs from 560 ft to 660 ft, a difference of 100 ft: gently rolling country.
Under the town center the state geologic map shows Bond Formation (shale, sandstone, limestone), from the Late Pennsylvanian, 304 to 307 million years old.
The section below crosses 2 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.
Shale, sandstone, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 16 mi of the line.
Shale, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 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 Martinsville reaches the Gulf of America by way of Little Creek, McNary Branch, the Embarras, Big Bayou, the Wabash River Old Channel, the Old Channel Wabash, the Ohio and the Mississippi: about 1,300 river miles.
970 miles of the trip are on the Mississippi.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Martinsville; river miles along the main stem, rounded.
Martinsville has a hot-summer humid continental climate. Summer afternoons average 88° in July; winter nights fall to about 19° in January. A normal year brings about 12 inches of snow; with the rain, that comes to about 46 inches of water.
On November 14 Martinsville normally reaches 55° and falls to 34°. The record high is 73°, in 1989; the record low 10°, in 1986. The most rain on this date, 1.36 in, fell in 2005.
Normals 1991–2020 and records since 1893 at Casey, 6 miles west-southwest. NOAA, through RCC-ACIS.
