Y 
i 
fs 
+ 
b 
S 
; 
; 
Dr A. Stelzner (1876—85)! a late professor of geology at the Uni- 
4 versity of Cördoba. During the summer 1871—1872 he traversed the 
province of Catamarca (in the N) and arrived also southward to the 
Nevado de Famatina with the purpose of making a slight investi- 
gation in all the mining fields here. During this trip Stelzner 
made an important discovery. In Potrero de los Angulos, on the 
Fig. 2. The Morro alto de Cordobés (about 4300 m.), Sierra de Umango ridge, seen from the south. 
The eastward dipping lines indicate the zone of lustering mica schists (see pag. 17). 
eastern side of the mountain he found fossiliferous schists of silurian 
age. The fossils were later described by E. Kayser (see 
later on). In his report Stelzner says, that the Nevado de Famatina 
differs from the so called ,Sierras pampeanas“ by the absence of 
gneissic rocks and by the predominance of slaty and quarzitic schists, 
further by more clastic members, having in common only the large 
granitic bosses. 
1 Compare the bibliography. 
