Results 51 to 60 of about 13,020 (209)

The analysis of spatial distributions, origins of caldera-forming eruptions with basaltic-andesitic magma compositions, and genesis of Miocene ignimbrites of the Eastern volcanic belt, Kamchatka

open access: yesГеодинамика и тектонофизика, 2019
Based on the statistical data of the Global Volcanism Program of the Smithsonian Institution and published materials, we present a comparative analysis of caldera-forming eruptions on global scale.
O. V. Bergal-Kuvikas   +2 more
doaj   +1 more source

New insights into the condensed nature and stratigraphic significance of the Late Neogene Ariki Formation, Taranaki Basin [PDF]

open access: yes, 2008
The Ariki Formation is a distinctive Late Miocene – Early Pliocene marl facies rich in planktic foraminifera, reaching thicknesses in the range 70 - 109 m in most exploration holes drilled into the Western Platform northwest of Taranaki Peninsula.
Hansen, Rochelle J., Kamp, Peter J.J.
core  

Petrogenesis of lavas from Detroit Seamount: Geochemical differences between Emperor Chain and Hawaiian volcanoes [PDF]

open access: yes, 2005
The Hawaiian Ridge and Emperor Seamount Chain define a hot spot track that provides an 80 Myr record of Hawaiian magmatism. Detroit Seamount (∼76 to 81 Ma) is one of the oldest Emperor Seamounts.
Abouchami   +115 more
core   +1 more source

Late Miocene to early Pliocene stratigraphic record in northern Taranaki Basin: Condensed sedimentation ahead of Northern Graben extension and progradation of the modern continental margin [PDF]

open access: yes, 2004
The middle Pliocene-Pleistocene progradation of the Giant Foresets Formation in Taranaki Basin built up the modern continental margin offshore from western North Island.
Hansen R. J.   +14 more
core   +2 more sources

Sedimentary mechanisms of a modern banded iron formation on Milos Island, Greece [PDF]

open access: yesSolid Earth, 2018
An early Quaternary shallow submarine hydrothermal iron formation (IF) in the Cape Vani sedimentary basin (CVSB) on Milos Island, Greece, displays banded rhythmicity similar to Precambrian banded iron formation (BIF).
E. Chi Fru   +9 more
doaj   +1 more source

A new model for submarine volcanic collapse formation [PDF]

open access: yesGeochemistry, Geophysics, Geosystems, 2003
Collapse pits and an associated suite of collapse‐related features that form in submarine lava flows are ubiquitous on the global mid‐ocean ridge crest. Collapse pits, the lava tube systems they expose, and lenses of talus created by the collapse process combine to produce a permeable region in the shallow ocean crust and are thought to contribute ...
Jennifer L. Engels   +4 more
openaire   +1 more source

Extent and Volume of Lava Flows Erupted at 9°50′N, East Pacific Rise in 2005–2006 From Autonomous Underwater Vehicle Surveys

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Seafloor volcanic eruptions are difficult to directly observe due to lengthy eruption cycles and the remote location of mid‐ocean ridges. Volcanic eruptions in 2005–2006 at 9°50′N on the East Pacific Rise have been well documented, but the lava volume ...
Jyun‐Nai Wu   +6 more
doaj   +1 more source

Reconstructing the complex history of a small-volume basaltic volcano (Ngatutura volcanic field, New Zealand) : The role of subsurface processes and implications for diatreme formation : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Earth Science at Massey University, Palmerston North, New Zealand [PDF]

open access: yes, 2016
Monogenetic volcanism is very common on continents and often occur very close to civilisation. Limiting the ability of volcanologists to predict the location and extent of future eruptions at monogenetic volcanic fields is the lack of knowledge about ...
Van Niekerk, Rickus
core  

Prodigious submarine landslides during the inception and early growth of volcanic islands [PDF]

open access: yes, 2017
Volcanic island inception applies large stresses as the ocean crust domes in response to magma ascension and is loaded by eruption of lavas. There is currently limited information on when volcanic islands are initiated on the seafloor, and no information
A Abdel-Monem   +66 more
core   +3 more sources

Volcanic facies and hydrothermal processes in Triassic pillow basalts from the Darnó Unit, NE Hungary

open access: yesGeologia Croatica, 2008
The Darnó Unit within the Zagorje-Mid-Transdanubian Megaunit is an allochtonous part of Dinarides in NE-Hungary and represents a relict of the Neotethyan accretionary complex.
Gabriella Kiss   +2 more
doaj   +1 more source

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