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Dalradian

Line breaks: Dal|ra¦dian
Pronunciation: /dalˈrɑːdɪən
 
/

Definition of Dalradian in English:

adjective

Geology
1Relating to or denoting a series of late Precambrian metamorphic rocks, occurring in Scotland and Ireland.
Example sentences
  • Kennedy and McKerrow observed that the Late Precambrian / Cambrian Dalradian sequences of the Scottish Highlands were deformed in the Ordovician.
  • Thus, movement along the Mannin Thrust brought mid-crustal plutons and Dalradian country rocks tectonically above the extrusive volcanic sequence.
  • Peak metamorphic temperatures in the Dalradian schists reached 620 30°C in the north but only c.400°C in the south.
1.1 (as noun the Dalradian) The Dalradian series of rocks.
Example sentences
  • Here, the first Grampian deformation to affect the Dalradian can be matched with very low-grade rocks in the adjacent Clew Bay Complex, a dismembered accretionary complex.
  • The age signature of detrital zircons within the Dalradian as well as the Torridonian and Moine is consistent with derivation from a Laurentian hinterland.
  • Current controversy over the maximum age of the Dalradian arises from contrasting interpretations of structural and lithostratigraphical relationships, and differing geological interpretation of chronological data.

Origin

late 19th century: from Dalrad-, from Dalriada (by alteration), + -ian.

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