Margaret E. Collinson

TL;DR: Palaeogene sediments obtained during the Arctic Coring Expedition are analysed, showing that large quantities of the free-floating fern Azolla grew and reproduced in the Arctic Ocean by the onset of the middle Eocene epoch and that onset and termination of the Azolla phase depended on the degree of oceanic exchange between Arctic Ocean and adjacent seas.

TL;DR: It is document that the microspores of these lycopsids were regularly released in unseparated tetrads indicative of failure to complete the normal process of spore development, providing concrete evidence for chronic environmental mutagenesis at the time of global ecological crisis.

TL;DR: The phytogeographic distribution of Cainozoic ferns is reported based upon a critical re-appraisal of the macrofossil and mesofossil record also taking account of evidence from a few highly diagnostic spores.

TL;DR: In this article, a fire burnt an area of heathland with stands of pine and birch trees in the Frensham Common Country Park near Tilford in Surrey, southeast England.

TL;DR: In this article, the authors carried out a series of waterlogging experiments on uncharred material and charcoal from a range of different plant types and tissues, and found that buoyancy contrasts are likely to result in separation during transport and deposition.