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porcellanite

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Porcellanite - Wikipedia
Porcellanite or porcelanite, is a hard, dense rock somewhat similar in appearance to unglazed porcelain. It is often an impure variety of chert containing clay ... en.wikipedia.org
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Porcellanite: Mineral information, data and localities.
A dense siliceous rock having the texture, dull luster, hardness, conchoidal fracture, and general appearance of unglazed porcelain. www.mindat.org
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Porcellanite
Porcellanite is found throughout southeastern Montana, northeastern Wyoming, and into western North Dakota. Specific formations have different types of ... www.projectilepoints.net
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porcellanite
porcellanite Min. (pɔəˈsɛlənaɪt) Also -ela-. [a. Ger. porzellanit (J. T. A. Peithner 1794), f. porzellan porcelain + -it, -ite1. So F. porcellanite.] A hard naturally-baked clay, somewhat resembling jasper: also called porcelain jasper. Also, a synonym of porcelain-spar (Chester).1796 Kirwan Elem. M... Oxford English Dictionary
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PORCELLANITE Definition & Meaning - Merriam-Webster
The meaning of PORCELLANITE is a hard dense siliceous rock having the appearance of unglazed porcelain on fresh fractures. www.merriam-webster.com
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Porcellanite in Alberta : a pyrometamorphic pre-contact toolstone
Porcellanite is a pyrometamorphic rock that forms when naturally ignited coal seams fuse fine-grained sedimentary rocks. open.alberta.ca
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Porcellanite | Metamorphic, Sedimentary, Igneous | Britannica
Porcellanite, hard, dense rock that takes its name from its resemblance to unglazed porcelain. Frequently porcellanite is an impure variety of chert containing ... www.britannica.com
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TERMINOLOGY OF SILICEOUS ROCKS
He describes porcellanite as a siliceous sedimentary rock with a dull or matte luster resembling that of unglazed porcelain that is less hard, dense, and ... www-odp.tamu.edu
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Porcellanite and the urban geology of Darwin, Northern Territory
Porcellanite is a siliceous duricrust which has developed within altered Cretaceous mudrocks in the Darwin city area and is well exposed in coastal cliffs to ... www.tandfonline.com
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Using Geochemistry to Interpret Porcellanite Stone Axe Production ...
Porcellanite was the single most important raw material used in the manufacture of stone axes in Ireland, accounting for more than half of the total. Of the two ... www.sciencedirect.com
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Porcellanite (shale)
Porcellanite is a hard, dense rock somewhat similar in appearance to unglazed porcelain, similar to chert, but has impurities contain clay and calcerous matter. gotbooks.miracosta.edu
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Mullite
Porcellanite Mullite (porcelainite) can be found as a constituent mineral in a type of thermally-metamorphosed rock called porcellanite. wikipedia.org
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mullite
mullite Min. (ˈmʌlaɪt) [f. Mull, the name of an island off the west coast of Scotland + -ite1.] A silicate of aluminium, approximately Al9Si3O20, that occurs as orthorhombic crystals, is formed naturally or artificially by the action of high temperatures on other aluminium silicates, and is used for... Oxford English Dictionary
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Tievebulliagh
Three small outcrops of porcellanite can be seen on the higher south-east slope. The "Malone Hoard", consisting of 19 polished stone axes from porcellanite Tievebulliagh or similar material from Brockley on Rathlin Island, was found wikipedia.org
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porcelain
porcelain (ˈpɔəsɪleɪn, ˈpɔəslən) Forms: α. (6 porcelana, 6–7 porcellana), 7– porcelain, (6–7 -cellan, -e, 6–9 -celaine, 7 -c'lane, 7–8 -celline, 8 -c'lain, 7–9 -celane; 6 (porseland) porslin, 7 porselan). β. 6–7 purcelan, 7 -ane, -ain, -aine, -ine, purcellan, pourcelain; 6–7 purslane, 6–8 -laine, 7 ... Oxford English Dictionary
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