IGEBA 23946
INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BUENOS AIRES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
C34/C33 LIMIT IN PROXIMAL MARINE SANTA MARTA FORMATION AND ITS CORRELATION WITH DISTAL RABOT FORMATION IN JAMES ROSS BASIN, ANTARCTICA
Autor/es:
MILANESE, FLORENCIA; OLIVERO, EDUARDO; KIRSCHVINK, JOSEPH; RAPALINI, AUGUSTO E.
Lugar:
Sao Paulo
Reunión:
Congreso; LatinMag 2015; 2015
Institución organizadora:
Asoc. Latinoamericana de Paleomagnetismo y Geomagnetismo
Resumen:
The Santa Marta Formation (Santonian - middle Campanian) is located in the northwestern tip of the JamesRoss Island, in the Antarctic Peninsula. The Rabot Formation (early-middle Campanian), that is equivalent to the upper part of the Santa Marta Formation, crops out at the southeastern sector of the island. Due to diachronic extinctions and endemism, biostratigraphic correlation of the James Ross Basin infill presents many uncertainties. We present here a preliminary magnetostratigraphic composite section of four outcropsof the Santa Marta Formation which suggests that the C34n/C33r reversal, and therefore the Santonian-Camapanian boundary, is recorded at the lower levels of the Santa Marta formation. This is consistent with previous magnetostratigraphic results on the Rabot Formation and agrees with biostratigraphic correlations based on ammonites associations.
