Results 61 to 70 of about 20,360 (229)
Volcanological aspects of the northwest region of Paraná continental flood basalts (Brazil) [PDF]
Solid Earth, 2015 There has been little research on volcanological aspects of Paraná continental flood basalts (PCFBs), and all investigations have mainly been concentrated on the internal portions of the lava flows.
F. Braz Machado +3 more
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Siberian flood basalt magmatism and Mongolia-Okhotsk slab dehydration [PDF]
, 2008 Experimental data combined with numerical calculations suggest that fast subducting slabs are cold enough to carry into the deep mantle a significant portion of the water in antigorite, which transforms with increasing depth to phase A and then to phase ...
Alexei V. Ivanov, Konstantin D. Litasov
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Eos, Transactions American Geophysical Union, 1991 Continental flood basalts have been receiving considerable scientific attention lately. Recent publications have focused on several particular flood‐basalt provinces (Brito‐Arctic, Karoo, Parana', Deccan, and Columbia Plateau), and much attention has been given to the proposed connection between flood‐basalt volcanism, bolide impacts, and mass ...
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Archaeometry, EarlyView.Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather +11 more
wiley +1 more source
Archaeometry, EarlyView.ABSTRACT As the capital of Makuria, Tungul was a major sociopolitical center within medieval Nubia, being the seat of a bishopric and a monastic community. During the excavation of the Kom H monastery, three burial crypts (Crypts 1–3) were uncovered.
Robert J. Stark +2 more
wiley +1 more source
Terrestrial, Atmospheric and Oceanic Sciences, 2011 The Jining volcanic field located in the southern margin of the Mongolian plateau and the western North China Block consists of four rock types: quartz tholeiite, olivine tholeiite, alkali olivine basalt and basanite.
Kung-Suan Ho +4 more
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Frontiers in Earth Science, 2018 The Late Permian Emeishan large igneous province (ELIP) is considered to be one of the best examples of a mantle plume derived large igneous province. One of the primary observations that favor a mantle plume regime is the presence of ultramafic volcanic
J. G. Shellnutt, Thuy T. Pham
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Early Holocene jökulhlaup chronology and deglaciation dynamics in central Iceland
Boreas, EarlyView.Glacial lake outburst floods (jökulhlaups) have occurred throughout the Quaternary in glaciated regions worldwide. Reconstructing flood chronology yields insight into deglaciation processes, environmental change and the role of extreme events in landscape evolution.
Greta H. Wells +4 more
wiley +1 more source
Mantle heterogeneity during the formation of the North Atlantic Igneous Province: Constraints from trace element and Sr-Nd-Os-O isotope systematics of Baffin Island picrites [PDF]
, 2004 Sr-Nd-Os-O isotope and major and trace element data from ~62 Ma picrites from Baffin Island constrain the composition of mantle sources sampled at the inception of North Atlantic Igneous Province (NAIP) magmatism.
Eiler, J. +5 more
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Flood Basalts, Basalt Floods or Topless Bushvelds? Lunar Petrogenesis Revisited: A Critical Comment [PDF]
Journal of Petrology, 2001 The lengthy paper on this subject by M. J. O’Hara Tompkins, 1999) and studies of crustal thickness (e.g. (2000) contains an interesting reassessment of lunar evoluNeumann et al., 1996). These papers are also not cited. tion, although it differs little in its conclusions from his This new evidence has led to a revision of the Al2O3 original views ...
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