Share this entry

Share this page

tholeiite

Saltos de línea: tho¦lei|ite
Pronunciación: /ˈθəʊlɪʌɪt
 
/

Definición de tholeiite en inglés:

sustantivo

[mass noun] Geology
A basaltic rock containing augite and a calcium-poor pyroxene (pigeonite or hypersthene), and with a higher silica content than an alkali basalt.
Example sentences
  • Trace element data and isotopic analysis demonstrate that the arc is composed of islandarc tholeiite and ocean-island basalts and calc-alkaline arc-type extrusive rocks.
  • Except for its lower degree of partial melting (hence, a higher content of volatile matter), alkali basalt is thought to have an origin similar to that of tholeiite.
  • In the Pechenga-Varzuga volcanosedimentary belt, alkali basalts eruptions about 2.2 Ga in age gradually gave way to tholeiite pillow lavas, Fe-picrite flows and Ti-rich basalts with ages around 1.98 Ga.

Origen

mid 19th century: from Tholei, the name of a village (now Tholey) in the Saarland, Germany, + -ite1.

Derivados

tholeiitic

1
Pronunciación: /ˌθəʊlɪˈɪtɪk/
adjetivo
Example sentences
  • In the Canaries, the lavas are much more compositionally varied in each of these stages, ranging from tholeiitic basalts to phonolites and trachytes.
  • A tholeiitic suite of dolerite dykes in the southwestern Borrowdale Volcanic Group is a separate, later magmatic event.
  • The Whin Sill complex is a large tholeiitic quartz dolerite intrusion in northern England.

Share this entry

Share this page

 

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

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Obtenga más de Oxford Dictionaries

Suscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día cumbersome
Pronunciación: ˈkʌmbəs(ə)m
adjective
large or heavy and therefore difficult to carry…