نتایج جستجو برای: Tethys

تعداد نتایج: 784  

2008
E. M. A. Chen F. Nimmo

[1] Flexural modeling of Ithaca Chasma on Tethys suggests that the elastic thickness and the surface heat flux were 5–7 km and 18–30 mW/m respectively, when the feature formed ( 4 Gyr B.P.). Tidal heating is a plausible heat source, suggesting that Tethys’ eccentricity was higher in the past. Depending on Tethys’ internal structure, eccentricities in the range 0.001 to 0.02 are sufficient to ha...

2012
Ke Zhang Francis Nimmo

An inferred ancient episode of heating and deformation on Tethys has been attributed to its passage through a 3:2 resonance with Dione (Chen, E.M.A., Nimmo, F. [2008]. Geophys. Res. Lett. 35, 19203). The satellites encounter, and are trapped into, the e-Dione resonance before reaching the e-Tethys resonance, limiting the degree to which Tethys is tidally heated. However, for an initial Dione ec...

2018
Holly Chiang James Hong Kevin Kiningham Laurynas Riliskis Philip Levis Mark Horowitz

Careful resource monitoring is necessary to understand usage patterns and set conservation goals in an institutional setting. Sensor systems provide data to measure consumption and evaluate the effectiveness of active interventions. However, deploying sensing systems can be difficult when infrastructure support is limited. This paper describes the process of designing Tethys, a wireless water f...

2001

The Mediterranean was formed as a result of movements in both the Earth and sea beginning back in the second era, around two hundred and twenty million years ago. Violent upheavals have marked its history every since. Up until then, the continents had formed a single island known as Pangea. When they floated apart, a sea was formed. The Greeks later called this sea Tethys, after a goddess born ...

Journal: :Science 1989
E J Barron W H Peterson

Three-dimensional numerical ocean circulation model experiments that were designed to evaluate the circulation characteristics for the mid-Cretaceous ( approximately 100 million years ago) show that the primary direction of flow through the Tethys Ocean was eastward; in contrast, a westward flowing circumglobal Tethys current has been a consistent feature of earlier reconstructions of Cretaceou...

2007
Mitsuru Yamamura Hodaka Kawahata Katsumi Matsumoto Reishi Takashima Hiroshi Nishi

The deep ocean conditions and circulation during the Cretaceous have been characterized mainly by the sediments from the Tethys Sea and the proto-Atlantic Ocean, because sedimentological data from the Pacific basin from that period have been quite limited. Here we present new geochemical measurements from sediments that we collected from two sites in Hokkaido, Japan, that were presumably deposi...

2014
Anne Replumaz Fabio A. Capitanio Stéphane Guillot Ana M. Negredo

In order to understand the potential controls on Asian tectonics during the subduction of the Tethys and Indian lithospheres, we reconstruct the coupled subduction-continent deformation history using tomographic imaging, kinematics constraints and numerical modeling. The global P-waves tomographic images of the mantle below the India-Asia collision zone provide constraints on the deep structure...

Journal: :Journal of evolutionary biology 2003
T Hrbek A Meyer

To test vicariant speciation hypotheses derived from geological evidence of the closing of the Tethys Sea, we reconstruct phylogenetic relationships of the predominantly fresh-water killifish genus Aphanius using 3263 aligned base pairs of mitochondrial DNA from samples representing 49 populations of 13 species. We use additional 11 cyprinodontid species as outgroup taxa. Genes analysed include...

2017
A. Smye K. Crispin

Ocean basins are formed when continents are broken apart. Adiabatic melt generation that is driven by rifting of continental lithosphere is strongly dependent on the rate of extension. Slow extension results in conductive heat loss from the upwelling mantle, whereas cooling is limited during fast extension and can result in the geotherm intersecting the peridotite solidus. However, there are fe...

2016
Jing Luan Peter Goldreich

Several pairs of solar system satellites occupy mean motion resonances (MMRs). We divide these into two groups according to their proximity to exact resonance. Proximity is measured by the existence of a separatrix in phase space. MMRs between Io–Europa, Europa–Ganymede, and Enceladus–Dione are too distant from exact resonance for a separatrix to appear. A separatrix is present only in the phas...

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