| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,909,719,764 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Dacite |
Also found in: Dictionary/thesaurus, Wikipedia | 0.01 sec. |
|
|
dacite [′dā‚sīt]
(geology) Very fine crystalline or glassy rock of volcanic origin, composed chiefly of sodic plagioclase and free silica with subordinate dark-colored minerals. Dacite a magmatic rock that is the effusive equivalent of granodiorite and quartz-diorite. Dacite consists of a finegrained or vitreous basic mass and phenocrysts of plagioclase and quartz, more rarely, of hornblende, biotite, and pyroxene, and sometimes, sanidine. Where albitization processes are widely developed, dacite turns into quartz al-bitophyre. Dacites were ejected by volcanoes in the Paleozoic (in the Urals, for example), Mesozoic, and Cenozoic (in the Caucasus, for example). They are also found among modern lavas on Kamchatka. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Mentioned in | ? | References in periodicals archive | ? | Encyclopedia browser | ? | Full browser | ? | |||
|---|---|---|---|---|---|---|---|---|---|---|
No references found | The primary external building stone is a fine-grained, light grey, dacitic volcanic rock, commonly called Haddington Island andesite. The geological mapping program has identified a rock sequence consisting of andesitic and dacitic volcanics intruded by microdiorite and quartz monzonitic stocks in an extensional environment typical of Nevada's Basin and Range geological province. OGS grab samples of pyritic, carbonatized gabbro yielded 130 ppb gold, a pyritic, dacitic flow contained 210 ppb gold, and a sample of pyritic, carbonatized mafic flows, taken from a small point on the north shore of Sunshine Lake, assayed 0. |
dacitic |
Dachverband Dialektisch Behaviorale Therapie Dachverband Entwicklungspolitischer Aktionsgruppen in Baden Dachverband Schweizer Interim Manager Daci Daci Dacia Dacia Dacia Dacia Trajana Dacia Trajana Dacian Dacian Dacian Dacian language Dacian language Dacians Dacians DACIL DACIM DACIMS DACIS dacite dacite dacite glass Dacite lava Dacite lava Dacite rock Dacite rock dacites dacites dacitic DACJDACK DACK Dackel Dackel Dackel Dackle Dackle Dackle Dacko, David dacks DACL DACLAM Dacliximab Daclizumab DACLOD DACM DACMA DACN DACNB DACNET Dacninae Dacnonypha DACNOS DACNOS Daco Daco Daco DACOA DACOC | |||||||
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|