Results 141 to 150 of about 703,808 (249)

An andesitic source for Jack Hills zircon supports onset of plate tectonics in the Hadean. [PDF]

Nat Commun, 2020
Turner S, Wilde S, Wörner G, Schaefer B, Lai YJ.   +4 more
europepmc   +1 more source

Early development of anoxia prior to the main euxinic phase of the Jenkyns Event on the margin of the Western Tethys (Sachrang Basin, Eastern Alps)

Sedimentology, EarlyView.
ABSTRACT Although the global expansion of oxygen‐depleted marine environments during the Early Toarcian Jenkyns Event (or Toarcian Oceanic Anoxic Event) is primarily inferred from successions in the NW European epicontinental basins, the timing of the expansion of anoxia in Tethyan basins, where hydrography potentially played a minor role, is poorly ...
Tamás Müller, Stefan Neumeister, Jan Schlögl, Emanuela Mattioli, Hans‐Jürgen Gawlick, Thomas J. Algeo, Adam Tomašových   +6 more
wiley   +1 more source

Mount Etna as a window into the lubricants of plate tectonics

, 2023
Pilet S, Reymond J, Rochat L, Corsaro RA, Chiaradia M, Caricchi L, Müntener O.   +6 more
europepmc   +1 more source

Drowned carbonate‐rimmed margin controlling shelf‐edge delta progradation and sedimentation dynamics: Upper Cretaceous Woodbine Formation, Texas, USA

Sedimentology, EarlyView.
ABSTRACT Shelf‐edge deltas are commonly interpreted to record basinward facies migration across uninterrupted, gently dipping shelf margins; however, examples from mixed siliciclastic‐carbonate margins reveal more complex depositional dynamics. Periods and areas of carbonate sedimentation within mixed siliciclastic‐carbonate margins can modify shelf ...
Abdulkarim Al‐Hussaini, Cornel Olariu, Charles Kerans, Ronald Steel   +3 more
wiley   +1 more source

Regionalized Formation and Recycling of New Venusian Crust at Chasmata

The Planetary Science Journal
Venus and Earth are geologically active in ways distinct from each other. Earth exhibits plate tectonics, where the primary resurfacing mechanism is crust formation along a globe-girdling, extensional tectonic setting in mafic crust, the mid-ocean ridge (
Nicholas J. Montiel, Luc L. Lavier, Douglas J. Hemingway   +2 more
doaj   +1 more source

Geochemical evidence for a widespread mantle re-enrichment 3.2 billion years ago: implications for global-scale plate tectonics. [PDF]

Sci Rep, 2020
Gamal El Dien H, Doucet LS, Murphy JB, Li ZX.   +3 more
europepmc   +1 more source

Earthquakes and Plate Tectonics

This article describes the theory of plate tectonics and its relation to earthquakes and seismic zones. Materials include an overview of plate tectonics, a description of Earth's crustal plates and their motions, and descriptions of the four types of ...

core  

Siliceous sponges or seawater as a silicon source? Tracing silicon burial pathways of the Upper Cretaceous opal‐CT deposits using δ30Si and δ7Li

Sedimentology, EarlyView.
ABSTRACT Classical models of formation of sedimentary siliceous rocks (flint, chert, opoka) commonly assume that the Cretaceous marine silicon (Si) cycle was primarily biologically controlled, broadly analogous to the modern ocean. In this framework, siliceous sponges are regarded as the principal source of dissolved silica (dSi) to sediment porewaters,
Agata Jurkowska, Ewa Świerczewska‐Gładysz, Marek Szczerba, Tomáš Magna, Szymon Kowalik Filipowicz   +4 more
wiley   +1 more source

Plate Tectonics: A Continuous Process

This page provides an introduction to plate tectonics for secondary students. Topics include plate motions, the layers of the Earth and oceanic versus continental plates.

core  

The Effects of Different learning Tasks on Model-building in

, 2008
Geology is a complex, semantically rich domain involving the interpretation of geological maps as external visualizations. Geological maps are complex in particular because 3-dimensional features must be inferred from 2-dimensional representations ...
Diagramming Versus Explaining, Plate Tectonics   +1 more
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