58 SIERRA DE UMANGO 
Later on Bodenbender has more closely investigated the same — 
ridge and also many others of the „Sierras pampeanas“, and from ~ 
there concluded, that in the Sierra de Famatina and somewhere — 
else in the crystalline basement lower paleozoic sediments do occur. 
They are partly penetrated with granite, as in the case with the 
mentioned silurian strata in the Famatina mountain. On the eastern - 
side of the latter Bodenbender discovered cambrian slates, con- | 
taining Dictyonema and Staurograptus, and limestone banks with 
Obolus and Agnostus. In a report (1916) about the Nevado de Fama- 
tinaBodenbenders opinion is: The intrusive granitic body of the 
named mountain, now vastly exposed on the surface, contains 
great inclusions of various schists, probably all of cambrosilurian 
age (see the little sketch map, page 30). In some small parts of 
better preservation they contain fossils, but are usually metamor- 
phosed, to a quite high degree by the granitic body and its innu- 
merable apophyses. Also mingled rocks (migmatites) occur in lower 
horizons. The continental or „Paganzo“ strata (Gondwana and red 
beds) in the Famatina mountain are to be found only to a small 
extent, and Bodenbender says: „la propagaciön reducida del 
permiano-carboniano ........ a causa de su dislocacion y denuda- 
cion nos priva de poder observar eventuales intrusiones“. This 
statement shows, that Bodenbender had no firm opinion regar- 
ding the relation between the granitic intrusion and the covering 
»Paganzo“ strata. Further the author supposes, however, that the 
intrusion probably occurred in permian or already in carboniferous 
time, while the ,Paganzo“ seems to lie partly „conformably“ with 
the cambrosilurian schists. A such „conformity“ was observed by 
Stelzner too from Potrero de los Angulos. | 
During a crossing of the Nevado de Famatina (Paso La Pampa— 
El Tocino) on the backward journey from the Sierra de Umango 
district the writer had some occasions to study the geological rela- 
tions. The many tectonically sunken remnants of red beds lie with 
basal detritic layers on the Famatina granitic rocks or on the por- 
