LOGANOGRAPTUS LOGANI (HALL) EN LA PRECORDILLERA DE SAN JUAN Y LA RIOJA

A J Cuerda, G O Ortega

Abstract


Loganograptus logani (HALL) IN THE PRECORDILLERA OF SAN JUAN AND LA RIOJA. - The occurrence of Loganograptus logani (Hall) in the lower levels of the Los Azules and Gualcamayo Formations (San Juan and La Rioja Provinces) is here mentioned. Its morphological features are also described. On the basis of the whole graptolitic association (Paraglossograptus etheridgei (Harrís ), Glyptograptus austrodentatus Harris & Kezle, Zygograptus
sp., and others), the fossil-bearing beds are assigned to the Middle Ordovician (Llanvim) .

Full Text:

 Subscribers Only