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flooking

flookan, flooking Mining.
  (ˈflʊkən, -ɪŋ)
  Also 9 fluc(c)an.
  [Of unknown origin; app. not Celtic.]
  a. A cross-course or transverse vein composed of clay. b. (See quot. 1869.)

1728 Nicholls in Phil. Trans XXXV. 403 The Load is frequently intercepted by the crossing of a Vein of Earth, or Stone..This transient Load is by the Miners term'd a Flooking. 1807 Carne ibid. XCVII. 293 A flookan..was discovered..which cut the lode at an angle of 45°. 1869 R. B. Smyth Goldf. Victoria 611 Flucan or Flookan, a sort of clayey substance, often found against the walls of a quartz reef, and accompanying cross-spurs and slides.

Oxford English Dictionary

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