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Pollen and spore assemblages in the Luwumbu Coal Formation (Lower Karroo) of the North Luangwa Valley, Zambia, and their biostratigraphic significance

1976; Elsevier BV; Volume: 21; Issue: 4 Linguagem: Inglês

10.1016/0034-6667(76)90044-0

1879-0615

J. Utting,

Plant Diversity and Evolution

Pollen and spore assemblages from the Luwumbu Coal Formation (Lower Karroo) of the northern part of the Luangwa Valley, Zambia, are described. Two assemblages have been recognised, one from banded siltstones and mudstones in the lower part of the formation, and the other from the overlying carbonaceous sediments of the upper part of the formation. The older assemblage is dominated quantitatively by monosaccate forms (Cannanoropollis and Plicatipollenites), and is generally similar to assemblages recorded by other workers from the Lower Karroo glacial and peri-glacial rocks of Zaire. The younger assemblages comprises a variety of supra-generic groups; the most common forms are disaccate (striate and non-striate) and trilete, but monosaccate, polyplicate, colpate, monolete and alete forms all occur. Genera which are especially common include Protohaploxypinus, Vesicaspora and Acanthotriletes. Cannanoropollis is abundant in the lower part of the younger assemblage. In general, the assemblage is similar to that recorded from the upper part of the Lower Coal Measures of the Ketewaka/Mchuchuma coalfield of Tanzania.