Article: Assemblages of miospores from some Upper Carboniferous coals and their associated sediments in the Yorkshire coalfield

An investigation has been made of the miospore assemblages in the coals at the bottom and top of certain Yorkshire seams and in the adjacent seat-earths and roof measures. The assemblages from the sediments are similar and are often richer in numbers of species than those from the adjacent coals. The spores provide no evidence for the existence on the seat-earths of a distinctive type of vegetation differing significantly in composition from that which formed the initial peat layer. Several spore genera do, however, show greater frequency of occurrence in the sediments than in the coals. The investigation suggests the value of seat-earths for the solution of correlation problems when the associated coal is lacking. Four new miospore species from the sediments are described, also remains of the algal genus Botryococcus. The miospore species are Leiotriletes turgidus, Punctatisporites arenosus, Convolutispora tumulosa, and Savitrisporites concavus.