Results 11 to 20 of about 113,650 (200)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst   +8 more
wiley  

+6 more sources

Mid-Ocean Ridge and Storm Enhanced Mixing in the Central South Atlantic Thermocline

open access: yesFrontiers in Marine Science, 2022
We investigate the spatial distribution of diapycnal mixing and its drivers in the central South Atlantic thermocline between the Rio-Grande Rise to the Mid-Atlantic Ridge.
Jingxuan Wei   +2 more
doaj   +1 more source

Estimates of the mean circulation in the deep (>2,000m) layer of the Eastern North Atlantic [PDF]

open access: yes, 1985
A total of 131 current meter records of between 6 and 24 month duration are analysed to describe the deep flow field of the eastern North Atlantic from 19° to 54°N and from the Continental Slope to the Mid Atlantic Ridge.
Dickson, R. R.   +3 more
core   +1 more source

Subseafloor Cross‐Hole Tracer Experiment Reveals Hydrologic Properties, Heterogeneities, and Reactions in Slow‐Spreading Oceanic Crust

open access: yesGeochemistry, Geophysics, Geosystems, 2020
The permeability, connectivity, and reactivity of fluid reservoirs in oceanic crust are poorly constrained, yet these reservoirs are pathways for about a quarter of the Earth's heat loss, and seawater‐rock exchange within them impact ocean chemical ...
C. Geoffrey Wheat   +6 more
doaj   +1 more source

A joint geochemical–geophysical record of time-dependent mantle convection south of Iceland [PDF]

open access: yes, 2014
The North Atlantic V-Shaped Ridges (VSRs) provide a spatially extensive and clear record of unsteady mantle convective circulation over >40 My>40 My.
S.M. Jones   +75 more
core   +5 more sources

The Energetic 2022 Seismic Unrest Related to Magma Intrusion at the North Mid‐Atlantic Ridge

open access: yesGeophysical Research Letters, 2023
A seismic swarm affected the 53.3°–54.3° Latitude North section of the Mid‐Atlantic Ridge from 26 September to 10 December 2022. We rely on regional, teleseismic and array data to relocate 61 hypocenters and derive 77 moment tensors.
S. Cesca   +3 more
doaj   +1 more source

South Scandinavian joints and Alpine/Atlantic-ridge tectonics

open access: yesAnnals of Geophysics, 2000
Field observations and studies of the joints and dykes in an area shed light on its younger tectonic development; thus, joint orientations measured in Southern Sweden and in Norway have been statistically studied and compared regarding their tectonic ...
A. E. Scheidegger, F. F. Zheng
doaj   +1 more source

Cephalopods of the northern Mid-Atlantic Ridge [PDF]

open access: yes, 2009
A two-leg cruise of R/V G. O. Sars in summer of 2004 along the Mid-Atlantic Ridge explored the diversity and distribution patterns of pelagic and non-hydrothermal bottom communities in the vicinity of the northern Mid-Atlantic Ridge.
Piatkowski, Uwe   +2 more
core   +1 more source

Mantle thermal pulses below the Mid-Atlantic Ridge and temporal variations in the formation of oceanic lithosphere [PDF]

open access: yes, 2003
A 20-Myr record of creation of oceanic lithosphere is exposed along a segment of the central Mid-Atlantic Ridge on an uplifted sliver of lithosphere. The degree of melting of the mantle that is upwelling below the ridge, estimated from the chemistry of ...
AC Lasaga   +47 more
core   +2 more sources

Implications of Updated Magnetic Anomalies for the Late Cretaceous Tectonic Evolution of Walvis Ridge

open access: yesGeophysical Research Letters, 2019
In the South Atlantic, a reorganization of the Mid‐Atlantic Ridge began before anomaly C34n (83.6 Ma) and ended before anomaly C30n (66.4 Ma), complicating tectonics of Rio Grande Rise and older Walvis Ridge (WR), which formed together at the Mid ...
S. Thoram, W. W. Sager, W. Jokat
doaj   +1 more source

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