Results 51 to 60 of about 279,186 (291)

Upper mantle P velocity structure beneath the Midwestern United States derived from triplicated waveforms [PDF]

open access: yes, 2012
Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure and mechanics of tectonic plates.
Chu, Risheng   +2 more
core  

Stratigraphy of the Hawai'i Scientific Drilling Project core (HSDP2): Anatomy of a Hawaiian shield volcano [PDF]

open access: yes, 2007
The Hawai'i Scientific Drilling Project (HSDP2) successfully drilled ∼3.1 km into the island of Hawai'i. Drilling started on Mauna Loa volcano, drilling 247 m of subaerial lavas before encountering 832 m of subaerial Mauna Kea lavas, followed by 2019 m ...
Baker, Michael   +3 more
core   +1 more source

Polygonal tepee structures of Arabia

open access: yesThe Depositional Record, EarlyView.
Tepee structures on Sheybarah Island form polygonal microbial cemented crusts in the intertidal. Radiocarbon dating suggests they formed in the Holocene and reflect minor sea‐level changes, highlighting their value as palaeoenvironmental indicators. Satellite surveys identified 126 polygonal features, including coral reefs that may have developed on ...
Pauline Falkenberg   +6 more
wiley   +1 more source

Oxidation state of Cu in silicate melts at upper mantle conditions

open access: yesScientific Reports
Beyond its economic value, copper (Cu) serves as a valuable tracer of deep magmatic processes due to its close relationship with magmatic sulfide evolution and sensitivity to oxygen fugacity (fO2).
Xingcheng Liu   +4 more
doaj   +1 more source

New Theory of the Earth [PDF]

open access: yes, 2007
New Theory of the Earth is an interdisciplinary advanced textbook on all aspects of the interior of the Earth and its origin, composition, and evolution: geophysics, geochemistry, dynamics, convection, mineralogy, volcanism, energetics and thermal ...
Anderson, Don L.
core   +2 more sources

Enhancing event stratigraphic correlations in the ultra‐deep Japan Trench using XRF‐CS cluster‐based chemostratigraphy

open access: yesThe Depositional Record, EarlyView.
Cluster‐based chemostratigraphy using XRF‐CS enables high‐resolution correlation of event deposits across contrasting depositional settings in the Japan Trench. This approach reveals previously unrecognised events and compositional heterogeneity, offering new insights into sediment provenance and earthquake‐triggered deposition, with implications for ...
Jyh‐Jaan Steven Huang   +4 more
wiley   +1 more source

Temporal niche partitioning of bacterial communities shaped by hydrologic fluctuations and drought regimes in karst caves

open access: yesEcological Processes
Background In monsoon regions, wet-dry cycles may establish environmental gradients that influence both the richness and composition of cave bacterial communities.
Sitong Gong   +5 more
doaj   +1 more source

Eutrophication and Geochemistry Drive Pelagic Calcite Precipitation in Lakes [PDF]

open access: gold, 2021
Hares Khan   +4 more
openalex   +1 more source

Orbital and eustatic control of basin hydrology during the first stage of the Messinian Salinity Crisis

open access: yesThe Depositional Record, EarlyView.
The paleo‐hydrology of the Sorbas Basin (SE Spain) and the wider Mediterranean region during the deposition of the Primary Lower Gypsum (PLG) stage of the Messinian Salinity Crisis, from ~5.97 to ~5.60 Ma, was affected by tectonics, precession‐forced climate oscillations, and eustatic sea‐level change.
Fernando Gázquez   +8 more
wiley   +1 more source

Mineralogy, Geochemistry and Provenance of Coastal Sands from Greece: New Insights on the REE Content of Black Coastal Sands from Aggelochori Area, N.-Greece [PDF]

open access: gold, 2021
Argyrios Papadopoulos   +5 more
openalex   +1 more source

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