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    STUDIA GEOLOGIA - Issue no. 2 / 2001  
         
  Article:   THE SPATIAL EXTENSION AND THE AGE OF THE TOMNATEC FORMATION IN AUDIA NAPPE.

Authors:  LIVIU IONESI, FLORIN FLOREA.
 
       
         
  Abstract:  In the northern area of Audia Nappe, in between Sălătruc River (a right hand tributary of Moldova River) and the northern border of our country, the Tomnatec Formation crops out. It unconformably overlies the Variegated Formation (Vraconian - Maastrichtian) and is covered by Ionul Formation (Priabonian). We have to mention that the Tomnatec Formation is better developed in the eastern part of Audia Nappe whereas on the rest of it crops out only sporadically. On this basis Ionesi divided Audia Nappe (1965, p. 66-67) in two digitations: the lower one, Prisaca Digitation, in the eastern part and the upper one, Black Shales’ Digitation, in the western part. The Black Shales’ Digitation is overthrusting upon the Prisaca Digitation after the Feredeu Fault. The lower digitation is tectonically subsided which could explain the better preservation of it while the upper digitation is tectonically uplifted. The upper digitation position is supposed to be the explanation for the missing of Tomnatec Formation from it. The same interpretation was reconsidered and developed by Ionesi (1971, p 157-158). ...  
         
     
         
         
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