Part of a series of articles titled Natural History in the National Capital Area.
Article • Natural History in the National Capital Area
National Capital Area Natural History - Geology
Geological Collections
Geological specimens include rocks, minerals, surface process samples, and soils. These specimens document the presence of geological materials, their mineral composition, structure and texture, and the processes that created them.
Rocks and Minerals
Mineral and rock collections from Rock Creek Park and Chesapeake and Ohio Canal National Historical Park include aplite (quartz and feldspar), galena, lead sulfide, gold, garnet, mica schist, ilmenite (a titanium-iron oxide mineral that is weakly magnetic), hematite (iron(III) oxide), quartz, rose quartz, and granite.
Maryland Mining Company
Canals constructed along the Potomac River were lifelines for people living along the Potomac River from 1831-1924.
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Last updated: May 23, 2023