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Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island.
| Dolding, P.J.D. | |
| 1992 | |
| In: Duane, A.M., Pirrie, D. and Riding, J.B. (eds.), 1992: Palynology of the James Ross Island Are | |
| Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island. |
Dolding, P.J.D., 1992: Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island; In: Duane, A.M., Pirrie, D. and Riding, J.B. (eds.), 1992: Palynology of the James Ross Island Area, Antarctic Peninsula. Antarctic Science, Volume 4,No.3: 311-326 Special Issue, September 1992. Blackwell Scientific Publications Abstract: Palynological analyses of the Marambio Group sediments of Humps Island (Santa Marta and Lopez de Bertodano formations) indicates that there is minor displacement across a prominent NW-SE trending normal fault which passes beneath the southern bluff. No major compositional differences were perceived between the palynomorph assemblages either side of the fault. A late Campanian age is suggested for both sequences, based on comparison with Australasian dinoflagellate cyst zonations. A new species of the dinoflagellate cystBourkidinium has been recorded from strata on either side of the fault. Asignificant number of recycled Permian and Early Cretaceous palynomorphs were recorded. Most are miospores and exhibit significant variation in preservational states, implying derivation from several sources . More thermally mature Permian gymnosperm pollen is most likely derived from the nearby Trinity Peninsula Group, exposed on the Antarctic Peninsula. The source of the relatively well preserved Permian pollen is problematic.