The Greig 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.
Chance of showers
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69° on Nov. 12, 2020, the hottest reading for this week of the year since 1925. Next is 65° in 1931.
Greig’s center stands about 1,450 ft above sea level. Within three miles the land runs from 1,290 ft to 1,690 ft, a difference of 400 ft: rolling country. The highest named summit within 15 miles is Panther Mountain, about 2,480 ft, 14 miles east.
Under the town center the state geologic map shows Charnockite, granitic and quartz syenite gneiss (charnockite, gneiss), from the Mesoproterozoic, 1 to 1.6 billion years old.
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 13×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Charnockite, gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 mi of the line.
Charnockite, gneiss. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 5 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 4 mi of the line.
Limestone. Age: Middle Ordovician, 459 to 471 million years old. About 2 mi of the line.
Gneiss. Age: Mesoproterozoic, 1 to 1.6 billion 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. 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 Greig reaches Lake Ontario by way of Fish Creek and the Black River: about 80 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Greig; river miles along the main stem, rounded.
Greig has a warm-summer humid continental climate. Summer afternoons average 75° in July; winter nights fall to about 4° in January. About 50 inches of rain fall in a normal year.
On November 14 Greig normally reaches 42° and falls to 26°. The record high is 60°, in 2005; the record low −2°, in 1939. The most rain on this date, 0.90 in, fell in 1925.
Normals 1991–2020 and records since 1925 at Stillwater Reservoir, 16 miles north-northeast, 240 ft higher. NOAA, through RCC-ACIS.
