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Tonalite is an igneous, plutonic rock, of felsic composition, with phaneritic (coarse-grained) texture. Feldspar is present as plagioclase (typically oligoclase or andesine ) with alkali feldspar making up less than 10% of the total feldspar content.
Tonality is the arrangement of pitches and / or chords of a musical work in a hierarchy of perceived relations, stabilities, attractions, and directionality.. In this hierarchy, the single pitch or the root of a triad with the greatest stability in a melody or in its harmony is called the tonic.
Tonalite–trondhjemite–granodiorite (TTG) rocks are intrusive rocks with typical granitic composition (quartz and feldspar) but containing only a small portion of potassium feldspar. Tonalite , trondhjemite , and granodiorite often occur together in geological records , indicating similar petrogenetic processes. [ 1 ]
Trondhjemite is a leucocratic (light-colored) intrusive igneous rock.It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. [1] Trondhjemites that occur in the oceanic crust or in ophiolites are usually called plagiogranites.
Bagatelle sans tonalité ("Bagatelle without tonality", S.216a) is a piece for solo piano written by Franz Liszt in 1885. The manuscript bears the title "Fourth Mephisto Waltz" [1] and may have been intended to replace the piece now known as the Fourth Mephisto Waltz when it appeared Liszt would not be able to finish it; the phrase Bagatelle ohne Tonart actually appears as a subtitle on the ...
The Bagatelle sans tonalité ("Bagatelle without tonality"; German: Bagatelle ohne Tonart), S. 216a, is sometimes included with Liszt's Mephisto Waltzes. The manuscript bears the title "Fourth Mephisto Waltz" [17] and may have been intended to replace the Fourth Mephisto Waltz when it appeared Liszt might not be able to finish it. [18]
A greater amount of plagioclase would designate the rock as tonalite. Granodiorite is felsic to intermediate in composition. It is the intrusive igneous equivalent of the extrusive igneous dacite .
Atonality in its broadest sense is music that lacks a tonal center, or key. Atonality, in this sense, usually describes compositions written from about the early 20th-century to the present day, where a hierarchy of harmonies focusing on a single, central triad is not used, and the notes of the chromatic scale function independently of one another. [1]