Results 11 to 20 of about 3,246 (166)
Permian Large Igneous Provinces and Their Paleoenvironmental Effects
Geophysical Monograph Series, Page 417-434., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jun Chen, Yi‐Gang Xu
wiley +7 more sources
Reconstructing the plinian and co-ignimbrite sources of large volcanic eruptions: A novel approach for the Campanian Ignimbrite [PDF]
Scientific Reports, 2016 The 39 ka Campanian Ignimbrite (CI) super-eruption was the largest volcanic eruption of the past 200 ka in Europe. Tephra deposits indicate two distinct plume forming phases, Plinian and co-ignimbrite, characteristic of many caldera-forming eruptions ...
Costa, Antonio +3 more
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Geological Magazine, 1967 With reference to recognition by P. C. Aw of the Temangan dike as an ignimbrite (see this Bibliography Vol. 31, No. 8, 10 E67-07201), it is pointed out that rocks mapped as quartz porphyry in other Malayan localities are probably also ignimbrites. The fissure in which the Temangan dike is located is considered part of a major structural element which ...
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Ignimbrite Analyses of Batur Caldera, Bali, based on 14C Dating
, 2014 http://dx.doi.org/10.17014/ijog.vol4no3.20094The Batur Caldera, in the northeastern part of Bali Island, is an elliptical collapse structure 13.8 by 10 km in size and another circular composite collapse structure with a diameter of 7.5 km in its centre ...
Igan S. Sutawidjaja
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Geostandards and Geoanalytical Research, EarlyView.Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
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Nature, 1961 A FIELD and laboratory study of the Ordovician ignimbrites of North Wales that has been in progress since 19531–3 has revealed certain limitations in Marshall's original hypothesis4 regarding the origin of this interesting category of rocks. These limitations have been apparent to workers elsewhere5–8.
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Geochronology and geochemistry of the Postberg ignimbrites, Saldanha, Western Cape, South Africa [PDF]
, 2020 >Magister Scientiae - MScThe Saldania Belt in southern Africa, a product of the Pan-African Saldanian Orogeny, forms part of a system of Neoproterozoic mobile belts that border and weld older cratons on the African continent.
Misrole, Matthew
core
Relationships between the geomechanics and petrography of ignimbrite [PDF]
, 2023 Fundamental petrographic controls on ignimbrite strength are examined, and those aspects of the texture and fabric of the rocks which are primarily responsible for the strength of ignimbrite identified.
Moon, Vicki G.
core
Loess Studies in Aotearoa New Zealand
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Loess in Aotearoa New Zealand (ANZ) has been studied since its first documented recognition (on Banks Peninsula) in 1878 by Julius von Haast. A decade later, John Hardcastle revealed that southern ANZ loess was both glacial in origin and contained signals of past climates.
Brent V. Alloway +4 more
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New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Mordenite is a naturally occurring zeolite mineral that is the seventh most common zeolite mineral globally, forming at low temperatures (≥100°C) in hydrothermal systems. In New Zealand, extensive deposits of mordenite are commonly associated with areas of hydrothermal alteration, particularly in the Coromandel and Taupo Volcanic Zones.
Ayrton R. Hamilton +6 more
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