Sentence examples for are of igneous origin from inspiring English sources
All these materials are of igneous origin, but their melting and crystallization history is complex.
Clarke estimated that 95percentt of crustal rocks are of igneous origin (formed from molten silicate masses, or magmas).
Inchmickery and Inchgarvie are of igneous origin and the latter is partly made up of picrite.
September 25 , 1750Wehrau, Germany June 30 , 1817Freiberg, Germany Abraham Gottlob Werner, (born Sept. 25, 1750, Wehrau, Saxony died June 30 , 1817 Freiberg), German geologist who founded the Neptunist school, which proclaimed the aqueous origin of all rocks, in opposition to the Plutonists, or Vulcanists, who argued that granite and many other rocks were of igneous origin.
This can be explained that the quartz grains from Hunshandake sandy land are mainly of igneous origin, while the quartz grains from Taklimakan Desert are mainly of metamorphic origin.
Much of Iceland is underlain by basalt, a dark rock of igneous origin.
For instance, there is high fluoride content in groundwater in Arusha, Manyara and Kilimanjaro regions due to dissolution of fluoride from fluoride bearing rocks of igneous origin (Ghiglieri et al. 2012).
It is important to be able to distinguish feldspar group minerals from other rock-forming minerals and from one another because their presence (versus absence), along with their relative quantities, serves as the basis for classifying and naming many rocks, especially those of igneous origin.
The other populations in the area grew on substrate of igneous origin and more closely matched Hooker's 1846 description of P. orchidioides.
Most are of Mexican origin.
