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Encyclopedia Britannica - Main :: DAH-DEM |
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DALRADIAN , in geology, a series of metamorphic rocks, typically developed in the high ground which lies E. and S. of the Great
Scotland . This was the old Celtic region of Dalradia, and in 1891 Sir A. Geikie proposed the name Dalradian as a convenient provisional designation for the complicated set of rocks to which it is difficult to assign a definite position in the stratigraphical sequence (Q.J.G.S. 47, p. 75): In Sir A. Geikie 's words, " they consist in large proportion of altered sedimentary strata, now found in the form of mica-schist, graphite-schist, andalusite
conglomerate
tuff
thousand feet." The Dalradian series includes the " Eastern or Younger schists " of eastern Sutherland
south
See PRE-CAMBRIAN; also J. B. Hill, Q.J.G.S., 1899, 55, and G. Barrow, loc. cit., 1901, 57, and the Annual Reports and Summaries of Progress of the Geological Survey of the United Kingdom from 1893 onwards. End of Article: DALRADIAN If you wish, you can link directly to this article.
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