Mining. 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.)

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1728.  Nicholas, 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.

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1807.  Carne, ibid., XCVII. 293. In sinking the shaft a flookan, about 2 inches wide, was discovered, bearing a south-east course, which cut the lode at an angle of 45°; and heaved and disordered it.

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1869.  R. B. Smyth, Gold Fields of 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.

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