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Beaver Dam, Maryland, a now "flooded marble quarry in Cockeysville, Maryland, that has been used as a swimming location since the 1930s. Source of dolomitic marble known specifically as Cockeysville Marble for the Washington Monument in Washington, D.C. and many other purposes in the eastern U.S. Greenspring Quarry, now a lake, Pikesville, Maryland
Edziza obsidian is a naturally formed volcanic glass found at the Mount Edziza volcanic complex in northwestern British Columbia, Canada. It occurs in at least four geological formations of the volcanic complex and was widely used by indigenous peoples during the pre-Columbian era .
Because the Glass Buttes complex has abundant, high-quality obsidian, the Bureau of Land Management has reserved 36 square miles (93 km 2) as a free-use area where the public can gather obsidian for private use. No permits are required; however, individuals can only remove 250 pounds (110 kg) of obsidian per year.
Obsidian scalpels older than 2100 BC have been found in a Bronze Age settlement in Turkey. [48] In the eastern Mediterranean area the material was used to make tools, mirrors and decorative objects. [49] The use of obsidian tools was present in Japan near areas of volcanic activity. [50] [51] Obsidian was mined during the Jōmon period.
The properties are distributed across Harris County. There is a concentration in "Downtown Houston", defined as the area enclosed by Interstate 10, Interstate 45, and Interstate 69. More than 100 are in the "Houston Heights" neighborhood whose borders are, approximately, Highway I-10 on the South, I-610 on the North, 45 on the East and Durham ...
You can also use Google Earth to explore the planet and various cities, locations, and landscapes using coordinates. The program covers most of the globe (97% back in 2019). The program covers ...
This is a list of unincorporated communities in the U.S. state of Texas, listed by county. This may include disincorporated communities, towns with no incorporated status, ghost towns , or census-designated places .
This week, explore what lurks in asteroid dust, marvel at the world’s largest beaded burial, discover an elusive creature photographed for the first time, and more.