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Klootchman Rock (also spelled Kloochman) is metamorphic rock boulder with white veins. The 35-foot (11 m) [14] tall boulder topped with grass, and its broken shards sit at the base of Blowers Bluff between Penn Cove and Oak Harbor. [15] [16] The rock has a National Geodetic Survey control station at its highest point. [14]
Largest known erratic in Washington State as of 2011, [12] and may be largest in the United States (but not North America; see the Alberta Big Rock 47°59.816′N 122°6.954′W / 47.996933°N 122.115900°W / 47.996933; -122.115900 ( Lake Stevens
Gore Mountain Garnet, found in the Adirondack Mountains in New York, contains the world's largest garnets. [1] [2] The rock that holds these garnets, garnet amphibolite, is sometimes referred to as 'black ore' or 'dark ore.' [1] [3] This rock formation formed during metamorphism during the Ottawan phase of the Grenvillian orogeny, and extremely high temperatures combined with introduction of ...
The Black Star of Queensland, also known as the Brimstone of Queensland, named after its nature and place of origin, is a 733-carat (146.6 g) black sapphire, and was the world's largest gem quality star sapphire until The Star of Adam was discovered. The Black Star sapphire is an oval-shaped gemstone cut as a cabochon like all other star ...
Big Rock is located along the side of Highway 7, and public parking is available at the turn-off. Despite the presence of a fence around Big Rock and a sign telling people not to climb, many tourists, who visit the rock, ignore the warnings to either boulder or climb the 9 m (30 ft) tall erratic. [5] [12]
Hertfordshire puddingstone is a silica-cemented conglomerate composed of rounded flint pebbles and cobbles with matrix of fine sand and silica cement. The Hertfordshire Puddingstone is characterized by silica-cemented flint gravel that is brown to deep red in colour and often exhibits black exteriors and thin rinds on cut or polished surfaces.
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