Results 101 to 110 of about 16,283 (208)

Guadalupe pluton–Mariposa Formation age relationships in the southern Sierran Foothills: Onset of Mesozoic subduction in northern California? [PDF]

open access: yes, 2009
We report a new 153 ± 2 Ma SIMS U-Pb date for zircons from the hypabyssal Guadalupe pluton which crosscuts and contact metamorphoses upper crustal Mariposa slates in the southern Sierra.
Ernst, W. G.   +2 more
core   +1 more source

The origin of planar lamination in fine‐grained sediment deposited by subaqueous sediment gravity flows

open access: yesThe Depositional Record
Planar lamination is a ubiquitous component of modern and ancient fine‐grained sediments deposited by subaqueous sediment gravity flows. These sediments commonly exhibit alternating sub‐millimetre‐thick, sharply bounded silt‐rich and clay‐rich layers ...
Omar N. Al‐Mufti, R. William C. Arnott
doaj   +1 more source

Deltas: New paradigms

open access: yesThe Depositional Record
Deltas are deposits directly accumulated by land‐generated gravity flows in a standing body of water. The paradigm of deltaic sedimentation has dramatically changed during recent years, from the popular very simplified ternary models of marine littoral ...
Carlos Zavala   +5 more
doaj   +1 more source

Sources and mechanisms for the enrichment of highly reactive iron in euxinic Black Sea sediments [PDF]

open access: yes, 2004
The deep basinal euxinic sediments of the Black Sea are enriched in iron that is highly susceptible to sulfidization compared to oxic/suboxic continental margin sediments in the Black Sea and oxic/dysoxic continental margin and deep-sea sediments ...
Anderson, T.F., Raiswell, R.
core  

Identification and characterization of ancient turbidite system lobes: an example from area Piwniczna – Muszyna, Poland [PDF]

open access: yesActa Montanistica Slovaca, 2008
The analysis of a deep-marine system relies heavily on the identification of the type and distribution of architectural elements(e.g. channels, lobes) within the system.
Daniela Mihaľová, Ľubomír Štrba
doaj  

LIVELLI CALCAREI CLASTICI DEL MIOCENE SUPERIORE E PLIOCENE NEL SOTTOSUOLO MOLISANO-PUGLIESE

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
The Molise and Apulia subsurface exploration has found clastic calcareous layers at the top of the Mesozoic—Miocene carbonate sequence and within the Middle Pliocene turbidites.
R. CASNEDI, A. BALDUZZI
doaj  

Clastic sedimentary rocks of the Michipicoten Volcanic-sedimentary belt, Wawa, Ontario [PDF]

open access: yes
The Wawa area, part of the Michipicoten greenstone belt, contains rock assemblages representative of volcanic sedimentary accumulations elsewhere on the shield.
Ojakangas, R. W.
core   +1 more source

Deep-sea Ordovician lingulide brachiopods and their associated burrows suggest an early colonization of proximal turbidite systems. [PDF]

open access: yesSci Rep, 2023
Paz M   +7 more
europepmc   +1 more source

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