[204] The initials f.n. (field names) are introduced to show that the term is used in the broad field sense proposed.
[205] Added by the authors of this work.
[206] The following definitions are given, as nearly as practicable, in accordance with present common usage, which is, however, more or less varying and inconsistent.
[207] A comprehensive discussion of the “Genesis of Ore Deposits” may be found in Vols. XXIII and XXIV of the Trans. of the Am. Inst. of Min. Eng. (also printed with additions in book form by the Institute, 1902), in which Posepny, Emmons, Van Hise, LeConte, Blake, Becker, Ricard, Raymond, Lindgren, Weed, Vogt, Winslow, Winchell (H. V.), Church, Cazin, Adams, Keyes, Bain, Collins, Beck, and DeLaunay participated. Various phases of the leading modern views are set forth.
[208] Chamberlin. Geol. of Wis., Vol. IV, p. 599 et seq., 1882.
[209] Penrose. Jour. of Geol., Vol. XI, pp. 135–155, 1903.
[210] Van Hise, Mono. XIX, U. S. Geol. Surv., pp. 268–295, 1892.
[211] Gilbert. Bull. Geol. Soc. Am., Vol. X, pp. 135–140, 1898.
[212] Branner. Jour. of Geol., Vol. VIII, pp. 481–484, 1900.
[213] Iddings. Jour. of Geol., Vol. VI, pp. 704–710.