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Related to Lapilli: Accretionary lapilli


Pyroclasts that range from 0.04 to 2.6 inches (1 to 64 millimeters) in diameter.



small rounded or irregularly shaped pieces of lava between the size of a pea and a walnut, ejected together with volcanic bombs and ash during volcanic eruptions. They are chunks of lava that have solidified in flight or fragments of volcanic and wall rock through which the eruption passed and which solidified earlier.

References in periodicals archive ?
Datos iniciales sugieren que las larvas colectadas durante el presente estudio eclosionaron entre enero y marzo o epoca humeda (n = 9 otolitos lapilli, S.
The people of the town were wiped out by the event, but the Roman way of living was perfectly preserved for years under the lapilli layer.
The crystalline lamproitic dome of the volcano is surrounded by a ring constituted by the phreatomagmatic-effusive complex, composed by contact breccia, phreatomagmatic breccia (with pyroclast ash, lapilli and bombs, and white carbonate clasts from the host rock) and lava interlayers (massive clastogenics and banded vesiculars).
El 21 de mayo de 2013, de nuevo ocurrieron emisiones de piroclastos, lapilli y material fino, simultaneamente, desde los mencionados boquetes de 2010 y 2012.
Among the three pairs of otoliths (sagittae, lapilli and asterisci) in teleost fish, sagittae are usually the largest and most commonly used in age determination and subsampling for stable isotope analysis [1-3].
For both species, lapilli were used because they were clearer and easier to interpret than sagittae, and they did not require sectioning or polishing.
All bony fishes have three pairs of otoliths: the sagittae lapilli and asterisci.
The otolith called lapilli occupies the utricular vestibule, the sagittae occupies the saccular and the asterisci the lagenar vestibule (Secor et al.
Petrographically the section was discriminated between accretionary lapilli tuffs, fine hyaloclastite tuffs and mudstones cycles.
Few authors have used asterisci and lapilli otoliths to observe growth rings, and only in fish larvae (Victor and Brothers, 1982; Brothers et al.