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lapilli

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Journal Article
Published: 27 March 2024
Seismological Research Letters (2024) 95 (4): 2554–2569.
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Journal Article
Journal: GSA Bulletin
Published: 05 February 2024
GSA Bulletin (2024) 136 (9-10): 3527–3552.
... heterogeneous microstructural, physical, and mechanical properties in subaerial, submarine, and subseafloor basaltic deposits. The connected porosity varies from 42% in weakly consolidated lapilli tuff in a submarine inflow zone to 21% in strongly lithified lapilli tuff in upper subseafloor deposits near...
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Journal Article
Published: 01 December 2023
American Mineralogist (2023) 108 (12): 2260–2282.
... are dominated by rhyolitic rocks, including effusive lava and minor tuff. The tuff layers, consisting of accretionary lapilli tuff and crystal welded tuff ( Fig. 1c ), conformably overlie sedimentary strata (e.g., limestone; Fig. 1c ). The rhyolitic lavas extend for ~50 km along a NE-striking fault system...
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Journal Article
Journal: GSA Bulletin
Published: 10 October 2023
GSA Bulletin (2024) 136 (5-6): 2325–2342.
.... White vapor, brown ash, and coarse material were suddenly ejected, and the products struck a group of people, injuring some of them. The proximal deposit formed a continuous mantle of ash, lapilli, and decimeter-sized bombs, while the ballistic material travelled up to 200 m from the lava edge...
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Journal Article
Journal: Geosphere
Published: 04 November 2022
Geosphere (2022) 18 (6): 1926–1957.
.... Pyroclastic deposits occur in four main facies: (1) lapilli- and blockdominated beds, (2) thinly bedded lapilli tuff, (3) laminated and cross-laminated ash, and (4) massive lapilli ash/tuff. Lapilli- and block-dominated beds are found mostly within several hundred meters of the crater and transition outward...
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Journal Article
Journal: Economic Geology
Published: 01 August 2022
Economic Geology (2022) 117 (5): 1173–1201.
...-bearing assemblages in the Big Campbell thrust sheet that have been variably metamorphosed to greenschist facies ( Murphy et al., 2006 ). However, primary textures are preserved throughout the rock units in the Grass Lakes and Wolverine Lake groups (e.g., lapilli, laminations), and as such, we omit...
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Series: GSA Special Papers
Published: 03 May 2022
DOI: 10.1130/2021.2553(27)
EISBN: 9780813795539
... TABLE 1. WATER-DEPOSITED VS. IMPACT-DEPOSITED SEDIMENTS TABLE 2. CONCRETIONS VS. ACCRETIONARY LAPILLI Figure 3. Low-angle cross-bedding in friable sandstone from a volcanic base surge (pyroclastic density current or PDC) deposit, Kilbourne Hole maar, southern New Mexico...
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Journal Article
Published: 01 April 2022
Russ. Geol. Geophys. (2022) 63 (4): 458–482.
... volcanic diamondiferous hydroexplosive-detrital complex composed of lapilli tuffs, xenotuffs, and tuffites of ultramafic rocks ( Proskurnin et al., 2012 ) and, probably, kimberlites ( Proskurnin and Shkarubo, 2014 ) or lamproites ( Letnikova et al., 2013 ), which formed with the active role...
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Journal Article
Journal: Geology
Published: 08 March 2022
Geology (2022) 50 (5): 636–640.
... impact, and most recently a drill core from the crater itself, yet the processes and chemical reactions occurring in the impact vapor plume are poorly constrained. Rounded carbonate particles, identified as accretionary lapilli, have been found thousands of kilometers from the impact crater and may...
FIGURES
Journal Article
Journal: Geology
Published: 01 December 2021
Geology (2022) 50 (3): 311–315.
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Series: GSA Special Papers
Published: 02 August 2021
DOI: 10.1130/2021.2550(08)
EISBN: 9780813795508
... and upper sedimentary target lithologies. Aggregates of recrystallized calcite with silicate melt indicate the consolidation of a hot suevitic component with sediments at ≳750 °C. Accretionary lapilli formed in a turbulent, steam-condensing environment at ~100 °C by aggregation of solid, ash-sized particles...
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Journal Article
Journal: Geology
Published: 23 July 2021
Geology (2021) 49 (11): 1307–1311.
... and expansion. New textural observations of sub-Plinian and Plinian pumice lapilli reveal that some primary products of magma fragmentation survive by sintering together within seconds of magma break-up. Their size distributions reflect the energetics of fragmentation, consistent with products of rapid...
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Series: Geological Society, London, Memoirs
Published: 27 May 2021
DOI: 10.1144/M55-2018-44
EISBN: 9781786209863
... immense phreatocauldrons filled with structureless tuff breccias and lapilli tuffs with thicknesses of as much as 400 m. Stratified sequences of tuff breccias, lapilli tuffs and tuffs are up to 200 m thick. Thin tuff beds are sparsely distributed in the lava sequences. Lava successions are mainly 400–500...
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Series: Geological Society, London, Memoirs
Published: 27 May 2021
DOI: 10.1144/M55-2018-59
EISBN: 9781786209863
... particularly on the flanks of the ridges, the northern slopes and in the centre. Yellow-orange lapilli tuffs with scattered lava blocks up to 15 cm long and laminated tuffs are exposed in the northern face of the nunatak. The pyroclastic rocks are extensively affected by syndepositional faulting and slumping...
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Series: Geological Society, London, Memoirs
Published: 27 May 2021
DOI: 10.1144/M55-2018-61
EISBN: 9781786209863
... Early being the tallest currently known ( c. 900 m high). Moreover, volcanoes in the Southern Local Suite are typically small scoria cones, whereas those in the Upper Scott Glacier Volcanic Field have more variable lithofacies, including a pillow mound, lapilli tuffs and subaerial lavas, together...
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Series: Geological Society, London, Memoirs
Published: 27 May 2021
DOI: 10.1144/M55-2019-2
EISBN: 9781786209863
... Hawaiite Ol > Pl 5 Hyh 4 ME15-005b Early Columnar jointed dyke Hawaiite Ol > Pl 6 Hyh, Tac 25 ME15-006 Early Lava block in lapilli tuff Hawaiite Ol > Pl > Cpx 10 Hyc, Tr 15 (large) ME15-007 Early Lava block in lapilli tuff Hawaiite Ol > Pl 8 Hyc, Tac <1...
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Journal Article
Published: 01 December 2020
Rocky Mountain Geology (2020) 55 (2): 75–89.
... Ma for zircons extracted from a recently recognized dacite lapilli ash-fall tuff near the base of the synorogenic Iron Springs Formation. We propose the name “Three Peaks Tuff Member” for this unit, and identify a type stratigraphic section on the western flank of the “Three Peaks,” a topographic...
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Journal Article
Journal: Geology
Published: 23 September 2020
Geology (2021) 49 (2): 211–215.
... highlight two sites ∼800 m north of the crater ( Fig. 2A ). Site U20–38 is on a flat, gently sloping surface. Ubehebe deposits there consist of laminated and cross-laminated, fine- to medium-ash deposits and some continuous layers of coarse ash and fine lapilli. The coarser layers are overlain by ash...
FIGURES
Journal Article
Published: 06 August 2020
Canadian Journal of Earth Sciences (2021) 58 (3): 247–267.
... ; Stewart et al. 2018 ). Fig. 3. Schematic cross-section through the Chisel sequence (modified after Bailes et al. 2013 ). [Colour online.] Volcaniclastic facies in this study are named using the granulometric terms tuff, lapilli tuff, lapillistone, and tuff breccia of Fisher (1966...
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Journal Article
Published: 21 April 2020
Geological Magazine (2020) 157 (12): 2021–2032.
... reworked tuffite containing pumice and lithic clasts that petrologically and geochemically resemble those found in KPT unit E tephra, and reworked accretionary lapilli similar to those in KPT unit F. Tuffite is found only downslope from a 375-m-high pass between the Dikeos and Sympetro mountains, which...
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