Acasta Aspera
Acasta may refer to: * ''Acasta'' (crustacean), a genus of barnacles * HMS ''Acasta'', various ships * ''Acasta''-class destroyers, First World War ships *Acasta Gneiss The Acasta Gneiss Complex, also called the Acasta Gneiss, is a body of felsic to Ultramafic rock, ultramafic Archean Basement (geology), basement rocks, gneisses, that form the northwestern edge of the Slave craton, Slave Craton in the Northwes ...

Acasta (crustacean)
''Acasta'' is a genus of barnacles in the family Balanidae The Balanidae is a family of barnacle Barnacles are arthropods of the subclass (taxonomy), subclass Cirripedia in the subphylum Crustacean, Crustacea. They are related to crabs and lobsters, with similar Nauplius (larva), nauplius larvae. Ba ..., containing the following species: Species * '' Acasta alba'' Barnard, 1924 * '' Acasta alcyonicola'' Utinomi, 1953 * '' Acasta armata'' Gravier, 1921 * '' Acasta aspera'' Yu, Kolbasov, Hosie, Lee & Chan, 2017 * '' Acasta canaliculata'' (Ren & Liu, 1978) * '' Acasta chejudoensis'' Kim & Kim, 1988 * '' Acasta clausa'' Yu, Chan, Achituv & Kolbasov, 2017 * '' Acasta conica'' Hoek, 1913 * '' Acasta coriolis'' Rosell, 1991 * '' Acasta crassa'' Broch, 1931 * '' Acasta cyathus'' Darwin, 1854 (sponge barnacle) * '' Acasta daedalusa'' Kolbasov, 1993 * '' Acasta denticulata'' Hiro, 1931 * '' Acasta dentifer'' (Broch, 1922) * '' Acasta echinata'' Hiro, 1937 * '' Acasta fenestrata'' ...
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HMS Acasta
Three ships of the Royal Navy have borne the name HMS ''Acasta'', whilst another two were planned: * was a 40-gun fifth rate frigate launched in 1797 and broken up in 1821. * HMS ''Acasta'' was to have been a wooden screw frigate Steam frigates (including screw frigates) and the smaller steam corvettes, steam sloops, steam gunboats and steam schooners, were steam-powered warships that were not meant to stand in the line of battle. The first such ships were paddle stea .... She was laid down in 1861 but was cancelled in 1863. * was an launched in 1912 and sold for scrap in 1921. * was an A-class destroyer launched in 1929. She was sunk in 1940 by the German battleships and . * HMS ''Acasta'' (P452) was to have been an , but was cancelled in 1945. References * p2 {{DEFAULTSORT:Acasta Royal Navy ship names ...
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Acasta-class Destroyer
The ''Acasta'' class (in September 1913 re-designated the K class) was a class of twenty destroyers built for the Royal Navy under the Naval Programme of 1911 - 1912 that saw service during World War I. They were the last class of Royal Navy destroyers to have mixed names with no systematic theme (see naming conventions for destroyers of the Royal Navy for more information.) When the class was designated as "K", names beginning with that letter were allocated to the ships but never used.No class of ships were designated as J class.Friedman 2009, p. 129. The class saw extensive wartime service and seven were lost, including four at the Battle of Jutland. Design The ''Acasta''s were larger and heavier armed than the preceding H and I classes ( and , respectively), displacing about 25% more and with the mixed calibre armament replaced with a uniform fit of QF 4-inch guns, which the ''Acasta''s introduced. Previous weapons had been of the breech-loading ( BL) type. The 4-in gu ...
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