Sobral Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Tertiary
 ....Sobral Formation
RTCretaceous
 Paleocene
 Antarctica
 Seymour Island
 James Ross Island
SNMaestrichtian? and Tertiary. James Ross Island and Seymour Island, Antarctica. Overlies Lopez de Bertodano Formation. Indexed with ages as applicable. Added to Thesaurus in 1993.