Lower Darriwilian radiolarians from the Argentine Precordillera.

MALETZ, J.; GUILLERMO LUIS ALBANESI; VOLDMAN, G. G.

Geobios

Año: 2008 p. 1 - 1

The first radiolarians discovered in the Ordovician of the Argentinian Precordillera are reported. The material is associated with conodontsindicating the upper part of the Lenodus variabilis Biozone (Lower Darriwilian, Da1-2). The low diversity radiolarian fauna shows similarities withMiddle Ordovician radiolarians from the Akzhal Mountains of Kazakhstan. However, a close comparison is difficult due to the poor preservation ofthe material, in which internal structures of the radiolarian tests are not preserved.