Results 41 to 50 of about 20,365 (298)

Review of Asymmetric Seafloor Spreading and Oceanic Ridge Jumps in the South China Sea

open access: yesJournal of Marine Science and Engineering
Seafloor spreading is an important cornerstone of the theory of plate tectonics. Asymmetric seafloor spreading and oceanic ridge jumps are common phenomena in this process and play important roles in controlling oceanic crust accretion, regional ...
Jiangong Wei   +7 more
doaj   +1 more source

Formation Waters Delineate Diverse Hydrogeologic Conditions at a Plate Scale: Eastern Flank of the Juan de Fuca Ridge

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The chemical composition of formation waters within the upper basaltic crust were calculated or measured at 24 sites on the northwest portion of the Juan de Fuca (JDF) Plate using data from sediment pore waters, scientific boreholes, and seafloor springs.
C. Geoffrey Wheat   +3 more
doaj   +1 more source

The Impact of Sea State Condition on Airborne Lidar Bathymetry Measurements [PDF]

open access: yes, 2012
Due to a large number of available Airborne Lidar Bathymetry (ALB) survey datasets and scheduled future surveys, there is a growing need from coastal mapping communities to estimate the accuracy of ALB as a function of the survey system and environmental
Axelsson, Andreas   +2 more
core   +2 more sources

Geomorphological Features and Formation Process of Abyssal Hills and Oceanic Core Complexes Linked to the Magma Supply in the Parece Vela Basin, Philippine Sea: Insights from Multibeam Bathymetry Analysis

open access: yesJournal of Marine Science and Engineering
Based on the new high-resolution multibeam bathymetry data collected by the “Dongfanghong 3” vessel in 2023 in the Parece Vela Basin (PVB) and previous magnetic anomaly data, we systematically analyze the seafloor topographical changes of abyssal hills ...
Xiaoxiao Ding   +7 more
doaj   +1 more source

Constraining the Jurassic extent of Greater India: Tectonic evolution of the West Australian margin [PDF]

open access: yes, 2012
Alternative reconstructions of the Jurassic northern extent of Greater India differ by up to several thousand kilometers. We present a new model that is constrained by revised seafloor spreading anomalies, fracture zones and crustal ages based on ...
Acton   +324 more
core   +1 more source

Forearc structures and deformation along the Manila Trench

open access: yesJournal of Asian Earth Sciences: X, 2020
The Manila Trench subduction zone is characterized by varying tectonic structures from north to south. Analyses of new seismic reflection data and bathymetric data indicate distinct morphological and deformational patterns in the forearc region ...
Leo T. Armada   +5 more
doaj   +1 more source

Active Long-Lived Faults Emerging Along Slow-Spreading Mid-Ocean Ridges [PDF]

open access: yesOceanography, 2012
In the classic mid-ocean ridge model, new seafloor is generated through a combination of magmatic diking feeding lava flows at the spreading axis, and the formation of short-offset, high-angle normal faults that dip toward the axis.
Deborah K. Smith   +3 more
doaj  

Seismic Evidence for Tectonically Dominated Seafloor Spreading in the Southwest Sub‐basin of the South China Sea

open access: yesGeochemistry, Geophysics, Geosystems, 2018
Seafloor spreading can be explained by different dynamic mechanisms, magmatically or tectonically dominated. The Southwest Sub‐basin, located at the southwest tip of the propagating seafloor spreading of the South China Sea, remains unclear for its ...
Junhui Yu   +6 more
doaj   +1 more source

Morphology and function of pinniped necks: The long and short of it

open access: yesThe Anatomical Record, EarlyView.
Abstract Terrestrial vertebrates from at least 30 distinct lineages in both extinct and extant clades have returned to aquatic environments. With these transitions came numerous morphological adaptations to accommodate life in water. Relatively little attention has been paid to the cervical region when tracking this transition.
Justin Keller   +3 more
wiley   +1 more source

Constraints on the Timing and Lower Crustal Accretion at the Schulz Massif, Mohns Ridge, Arctic Mid Ocean Ridges

open access: yesGeochemistry, Geophysics, Geosystems
The ultraslow‐spreading Mohns Ridge is a key supersegment of the Arctic Mid‐Ocean system, where it represents a boundary between the Jan Mayen hotspot in the south and the highly anomalous Knipovich Ridge to the north.
A. Bjerga   +5 more
doaj   +1 more source

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