Silver Spring in Montgomery County, Maryland — The American Northeast (Mid-Atlantic)
Mica Mine Ruins
The mine was located in a wooded area on the western bank of the Northwest Branch, which is now adjacent to the Springbrook Forest subdivision.
Mica is a silver-colored, heat resistant rock that can be split into thin transparent sheets. In the late 19th and early 20th centuries, mica was used to make windows in cast-iron heating stoves. Mica was also used for lamp shades, electrical equipment, and cosmetics.
When workable quantities of mica were found here, the Gilmore Mica Mines began operations at this site in 1882. The mine, with a 50-foot vertical shaft, ceased operation in the 1920s, and had largely disappeared by the time the subdivision was built. Look closely at the ground, however, and you might still be able to see traces of shiny mica rock.
"Drink in the beauty ... and wonder at the meaning of what you see." -- Rachel Carson, The Sense of Wonder (posthumously 1965)
Erected by Montgomery Parks.
Location. 39° 3.704′ N, 77° 1.565′ W. Marker is in Silver Spring, Maryland, in Montgomery County. Marker is on Kemp Mill Road, on the right when traveling north. Touch for map. On the Grounds of the Northwest Branch Trail. Marker is at or near this postal address: Northwest Branch Trail, Silver Spring MD 20902, United States of America.
Other nearby markers. Prehistoric Rock Shelters (here, next to this marker); The Northwest Branch (about 600 feet away, measured in a direct line); Kemp Mill (approx. 0.3 miles away); The Pond in Summer (approx. 0.4 miles away); The Pond in Spring (approx. 0.4 miles away); The Pond in Winter (approx. 0.4 miles away); The Pond in Autumn (approx. 0.4 miles away); One Tree's Life (approx. 0.4 miles away). Touch for a list and map of all markers in Silver Spring.
Categories. • Natural Resources •
Credits. This page was last revised on November 30, 2017. This page originally submitted on November 26, 2017, by Devry Jones of Washington, District of Columbia. This page has been viewed 77 times since then and 30 times this year. Photos: 1, 2, 3. submitted on November 26, 2017, by Devry Jones of Washington, District of Columbia. • Bill Pfingsten was the editor who published this page.