Scratchgravel Hills

Scratchgravel Hills

Scratchgravel Hills as viewed from Lake Helena
Highest point
Elevation 5,233 feet (1,595 m)
Coordinates 46°40′35″N 112°05′04″W / 46.67639°N 112.08444°W / 46.67639; -112.08444 (Scratchgravel Hills)Coordinates: 46°40′35″N 112°05′04″W / 46.67639°N 112.08444°W / 46.67639; -112.08444 (Scratchgravel Hills)[1]
Geography
Location Lewis and Clark County, Montana

The Scratchgravel Hills, el. 5,233 feet (1,595 m) are a small summit of hills northwest of Helena in Lewis and Clark County, Montana. The area has seen increased development and a drop in water level in recent years. The Scratchgravel Hills have alluvial deposits on top of faulted granitic bedrock.[2] There was extensive mining in the area in late 1800s through the 1930s. The northern part of the region has folding shale, sandstone and limestone from the Algonkian (Belt) age. Adjacent granite has altered them into quartz-mica schist and related rocks. The southern and central portions of the region contains quartz monzonite.[3] Bitterroot and conifers are common in the area.[4]

See also

Notes

  1. ↑ "Scratchgravel Hills". Geographic Names Information System. United States Geological Survey.
  2. ↑ "GWIP Project Area: Scratchgravel Hills, Lewis and Clark County" (PDF). Ground-Water Investigations Program. Montana Bureau of Mines and Geology, Montana Tech of the University of Montana. Retrieved September 24, 2011.
  3. ↑ "Scratchgravel Hills Historical Context". Montana Department of Environmental Quality. Retrieved September 24, 2011.
  4. ↑ "Botanical Survey of the Scratchgravel Hills, Lewis and Clark County, Montana" (PDF). Montana Natural Heritage Program. Retrieved September 24, 2011.
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