Hard, peralkaline igneous rock, a type of light blue grey rhyolite
Comendite at Lookout 589 in the Glass House Mountains Comendite is a hard,peralkaline igneous rock , a type of light blue greyrhyolite .[ 1] Phenocrysts are sodicsanidine with minoralbite and bipyramidalquartz .[ 2] riebeckite orarfvedsonite .[ 3] Changbaishan volcano in northeast China erupted comenditepumice .[ 4]
Comendite derives its name from the area of Le Commende onSan Pietro Island in Italy, where the rock type is found.[ 5] Glass House Mountains of southeastQueensland , Australia, as well as inSardinia ,Corsica ,Ascension Island ,Ethiopia ,Somalia and other areas ofEast Africa .[ 2]
^ Troll, Valentin R.; Schmincke, Hans-Ulrich (2002-02-01)."Magma Mixing and Crustal Recycling Recorded in Ternary Feldspar from Compositionally Zoned Peralkaline Ignimbrite 'A', Gran Canaria, Canary Islands" .Journal of Petrology .43 (2):243– 270.doi :10.1093/petrology/43.2.243 ISSN 0022-3530 . ^a b Iddings, Joseph Paxson , 1913,Igneous rocks: composition, texture and classification , v. 2, pp. 94-96^ Rocks and landscapes of the Sunshine Coast by Warwick Willmott, Brisbane: Geological Society of Australia Queensland Division, 2007 ^ Changbaishan volcano, China - facts and information . Retrieved 2013-07-24.^ Cioni, R. and Funedda, A., (2005)Structural geology of crystal-rich, silicic lava flows: A case study from San Pietro Island (Sardinia, Italy) in Manga, M. and Ventura, G. (editors) (2005)Kinematics and Dynamics of Lava Flows , Geological Society of America Special Paper 396, pages 1 to 14.
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