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[ *53 3 CIIAP. VIII. Class III.—Fuktz Rocks. ' Flcetz Gebirge.—Werner. Roches ttratiformes ou fecondaires, Brochant. J. XT was long the prevalent opinion, that the J[ various rocks of this clafs were confined to particular diftrifts, and were therefore partial and unconne&ed depositions. The difcoveries of Werner, and the numerous obfervations made in different parts of the earth by his pupils, have demonftrated, that the floetz, like the primi tive and tranfition rocks, are in general univerfal formations, confequently extend around the whole globe. 2. They occur ufually at the foot of primitive mountains, or in deep valleys, and in the firft cafe they are generally very widely extended. They all prefent a gradually diminilhing level of the outgoings of the newer and newer formations, ex cepting in the cafe of the neweft formations, where the petition is unconformable and overlying. They feldom reach to a very great height, which {hews that the ocean, although univerfal, did not at that time cover the whole earth. There is, however, an exception to this in the newetl. floetz trap formation, which we find covering the fum- 1 Vol. III. U Ulits