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Definition of dacite in English: dacitenoun ˈdeɪsʌɪtˈdeɪsaɪt mass nounGeology A volcanic rock resembling andesite but containing free quartz. 〔地质〕英安岩 Example sentencesExamples - The canyon is carved out of dacite, and there are some large trees with yellow and green leaves.
- The volcanic strata consist of sheet-like flows of andesite, dacite, basalts, and trachybasalts that are interbedded with agglomerates and tuffs.
- The belt comprises subalkaline andesites, trachyandesites, dacites, rhyolites, trachyrhyolites, and granodiorites, granites, granosyenites and monzonites, and developed along an active continental margin.
- The lava dome is made of dacite, a fine-grained volcanic rock that contains a sprinkling of larger, visible crystals, like chopped fruit in a cake.
- Unchallengeable examples of what are assumed to have been beta quartz appear to be limited to occurrences in silicic volcanic rocks, such as rhyolite, liparite, and dacite.
Derivativesadjectivedeɪˈsɪtɪk Geology The sulfur at El Desierto occurs in a whitish to grayish Pliocene tuff, consisting mostly of hardened, chiefly andesitic to dacitic, volcanic ashes, and capped by basalt. Example sentencesExamples - Previous work also has documented the presence of two distinct magma compositions beneath Nevado del Ruiz, one andesitic and the other dacitic, with mixing and mingling between the two during the November 1985 eruption.
- The oldest rock unit exposed is the arc-related Uriconian Group, consisting of lavas and tuffs of basaltic, basaltic-andesite, dacitic and rhyolitic composition.
- Taapaca Volcanic Complex is a large dacitic volcano located in the western border of the active zone of the Central Andes of Northern Chile.
- The injection of a mafic magma into a more silicic magma chamber is an important trigger mechanism in moderate-sized andesitic, dacitic and rhyolitic eruptions.
OriginLate 18th century: from the name of the Roman province of Dacia (as it was first found in the Carpathian Mountains) + -ite1. Definition of dacite in US English: dacitenounˈdeɪsaɪtˈdāsīt Geology A volcanic rock resembling andesite but containing free quartz. 〔地质〕英安岩 Example sentencesExamples - The lava dome is made of dacite, a fine-grained volcanic rock that contains a sprinkling of larger, visible crystals, like chopped fruit in a cake.
- Unchallengeable examples of what are assumed to have been beta quartz appear to be limited to occurrences in silicic volcanic rocks, such as rhyolite, liparite, and dacite.
- The belt comprises subalkaline andesites, trachyandesites, dacites, rhyolites, trachyrhyolites, and granodiorites, granites, granosyenites and monzonites, and developed along an active continental margin.
- The canyon is carved out of dacite, and there are some large trees with yellow and green leaves.
- The volcanic strata consist of sheet-like flows of andesite, dacite, basalts, and trachybasalts that are interbedded with agglomerates and tuffs.
OriginLate 18th century: from the name of the Roman province of Dacia (as it was first found in the Carpathian Mountains) + -ite. |