Share this entry

Share this page

asthenosphere

Saltos de línea: as¦theno|sphere
Pronunciación: /əsˈθɛnəsfɪə
 
/

Definición de asthenosphere en inglés:

sustantivo

Geology
The upper layer of the earth’s mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
Example sentences
  • Because the downgoing slab of lithosphere is heavier than the plastic asthenosphere below, it tends to sink passively; and the older the lithosphere, the steeper the dip.
  • The models consist of a two-layered brittle-ductile system representing the overriding continental lithosphere, overlying a low-viscosity layer simulating the asthenosphere to provide isostatic support.
  • Scientists believe that below the lithosphere is a relatively narrow, mobile zone in the mantle called the asthenosphere.

Origen

early 20th century: from Greek asthenēs 'weak' + sphere.

Derivados

asthenospheric

1
adjetivo
Example sentences
  • They are interpreted to have been derived from subduction modified lithospheric and asthenospheric mantle sources.
  • We attribute the rapid return to subsidence in the basin to the confinement of abnormally hot asthenospheric mantle in the zone of continental break-up to the NW as sea-floor spreading commenced.
  • Given the lack of evidence for significant magmatism in the area, the likely heat sources are either radiogenic, or elevated heat flux from asthenospheric mantle emplaced at a relatively shallow level beneath the orogen.

Definición de asthenosphere en:

Share this entry

Share this page

 

¿Qué te llama la atención de esta palabra o frase?

Obtenga más de Oxford Dictionaries

Suscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día verbose
Pronunciación: vəːˈbəʊs
adjective
using more words than are needed…