Next Paper
View PDF

Lower Jurassic floras from Hope Bay and Botany Bay, Antarctica
Rees, P.M. & Cleal, C.J. (2004)
Special Papers in Palaeontology No. 72. Blackwell Publishing: 96pp.

ABSTRACT. Hope Bay and Botany Bay, Graham Land, Antarctica have yielded two of the most diverse floras known from the Jurassic. Because of its high diversity, as well as its early discovery and description (by T. G. Halle in 1913), the Hope Bay flora has served as a taxonomic standard for studies of other Mesozoic floras from Gondwana.

This paper presents a major revision of the Hope Bay flora, based on extensive subsequent collections. A nearby flora from Botany Bay is described for the first time. Thirty-seven species are now recognised in the Hope Bay flora and 32 from Botany Bay. The floras are closely similar; 80 per cent of the Botany Bay species also occur at Hope Bay. They are shown here to be Early Jurassic, which contradicts the results of previous studies that suggested a Late Jurassic or earliest Cretaceous age.

The revision of their age has special significance for our understanding of the Mesozoic geological history of the Antarctic Peninsula. It also highlights the need for reappraisal of a number of other Mesozoic Gondwanan floras that had been dated mainly on their close similarity to the Hope Bay flora. The taxonomic work has resulted in establishment of a new combination, Taeniopteris taeniopteroides, and emendation of the diagnoses of Coniopteris oblonga, Sphenopteris nordenskjoeldii, Sphenopteris pecten and Komlopteris indica.

Some of my related publications:
2003 Cleal, C.J. & Rees, P.M. The Middle Jurassic flora from Stonesfield, Oxfordshire, UK. Palaeontology, 46: 739-801. [abstract] [pdf]
1993 Rees, P.M. Revised interpretations of Mesozoic palaeogeography and volcanic arc evolution in the northern Antarctic Peninsula region. Antarctic Science, 5(1): 77-85.
1993 Rees, P.M. Caytoniales in Early Jurassic floras from Antarctica. Geobios, 26(1): 33-42.
1993 Rees, P.M. Mesozoic floras from the northern Antarctic Peninsula. Comptes rendus de l'Académie des Sciences, Série II, 316(11): 1651-1657.
1993 Rees, P.M. Dipterid ferns from the Mesozoic of Antarctica and New Zealand and their stratigraphical significance. Palaeontology, 36(3): 337-356.
1993 Rees, P.M. & Cleal, C.J. Marked polymorphism in Archangelskya furcata, a pteridospermous frond from the Jurassic of Antarctica. Special Papers in Palaeontology, 49: 85-100.
1989 Rees, P.M. & Smellie, J.L. Cretaceous angiosperms from an allegedly Triassic flora at Williams Point, Livingston Island, South Shetland Islands. Antarctic Science, 1(3): 239-248.