Andesitic


a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite.
Historical Examples

It is composed of andesitic lavas of the augite type, is pierced by many fumaroles, and has a crater in the solfatara stage.
The Solomon Islands and Their Natives H. B. (Henry Brougham) Guppy

These are characterized by igneous rocks of andesitic nature.
The Avifauna of Micronesia, Volume 3 Rollin H. Baker

Amongst them I may mention those of Bougainville Strait, which are composed of andesitic lavas of the hornblende type.
The Solomon Islands and Their Natives H. B. (Henry Brougham) Guppy

The building fronts the west, and is constructed of an andesitic tuff of inferior quality and dark colour.
Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 3 Various

Great masses of granite, syenite and diorite were intruded at this period, and send tongues even into the andesitic tuffs.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 Various

After the cessation of the andesitic eruptions, a quiescent period of great length ensued.
The Yellowstone National Park Hiram Martin Chittenden

noun
a fine-grained tan or grey volcanic rock consisting of plagioclase feldspar, esp andesine, amphibole, and pyroxene
andesite
(ān’dĭ-zīt’)
A gray, fine-grained volcanic rock. Andesite consists mainly of sodium-rich plagioclase and one or more mafic minerals such as biotite, hornblende, or pyroxene. It often contains small, visible crystals (phenocrysts) of plagioclase. It is the fine-grained equivalent of diorite.

Read Also:

  • Andf

    andf Architecture Neutral Distribution Format

  • Andhra pradesh

    a state in SE India, formed from portions of Madras and Hyderabad states 1956. 105,963 sq. mi. (274,444 sq. km). Capital: Hyderabad. Contemporary Examples Andhra Pradesh has 42 parliamentary constituencies; 33 of these elected Congress candidates in the previous election. India’s Newest State Telangana Is Bosnia Redux Kranti Rai March 21, 2014 Andhra Pradesh, stretching […]

  • Andiamo

    let’s go; hurry up. Historical Examples As the girls came out he said, “andiamo presto, Signorine,” and started off at a brisk pace with the lantern. Flora Adair, Vol. 1 (of 2) A. M. Donelan Rinaldo flourishes his sword with the wonderful cry “andiamo!” Sea and Sardinia D. H. Lawrence Padre mio, io son qui […]

  • Castagno

    Andrea del [ahn-dre-ah del] /ɑnˈdrɛ ɑ dɛl/ (Show IPA), (Andrea di Bartolo di Bargilla) c1423–57, Florentine painter. Historical Examples The latter had the secret of painting in oils, and yielded to Castagno’s entreaties to impart it to him. Passages From the French and Italian Notebooks, Volume 2 Nathaniel Hawthorne Left an orphan in his boyhood, […]

  • Andie

    a male or female given name. Contemporary Examples Andie MacDowell is a charming foil, and Stephen Tobolowsky is the perfect insurance salesman from hell. Harold Ramis’s ‘Groundhog Day’ Is About as Perfect as a Movie Gets Malcolm Jones February 24, 2014 A few months later, they met Andie, 56 at a poly retreat in upstate […]


Disclaimer: Andesitic definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.