Palynology, Plant Macrofossils

Morphological trends in the fossil pollen of Decodon and the paleobiogeographic history of the genus

by Fridgeir Grimsson

2012
Fridgeir Grimsson, David K. Ferguson, Reinhard Zetter
International Journal of Plant Sciences

A Late Messinian Palynoflora with a Distinct Taphonomy

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 9

A Lakeland Area in the Late Miocene

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 8

The Middle Late Miocene Floras - A Window into the Regional Vegetation Surrounding a Large Caldera

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 7

The Classic Surtarbrandur Floras

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 5

The Archaic Floras

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 4

Systematic Palaeobotany

by Fridgeir Grimsson

2011
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter, Leifur A Simonarson
Springer
Chapter 3

Pollen, fruits, and leaves of Tetracentron (Trochodendraceae) from the Cainozoic of Iceland and western North America and their palaeobiogeographic implications

by Fridgeir Grimsson

2008
Fridgeir Grimsson, Thomas Denk, Reinhard Zetter
Grana

Episodic migration of oaks to Iceland: Evidence for a North Atlantic "land bridge" in the latest Miocene

by Fridgeir Grimsson

2010
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter
American Journal of Botany

Fagaceae from the early Oligocene of Central Europe: Persisting New World and emerging Old World biogeographic links

by Fridgeir Grimsson

2012
Thomas Denk, Fridgeir Grimsson, Reinhard Zetter
Review of Palaeobotany and Palynology

Upper Tertiary non-marine environments and climate changes in Iceland

by Fridgeir Grimsson

2008
Fridgeir Grimsson, Leifur A Simonarson
Jökull

Middle Miocene floras of Iceland - the early colonization of an island?

by Fridgeir Grimsson

2007
Fridgeir Grimsson, Thomas Denk, Leifur A Simonarson
Review of Palaeobotany and Palynology

Elstu flórur Íslands / Late Langhian to early Serravallian floras of Iceland

by Fridgeir Grimsson

2007
Fridgeir Grimsson, Leifur A Simonarson, Thomas Denk
Natturufraedingurinn

Beyki úr íslenskum setlögum / Beech (Fagus) from Icelandic sediments

by Fridgeir Grimsson

2006
Fridgeir Grimsson, Leifur A Simonarson
Natturufraedingurinn

Fagus from the Miocene of Iceland: systematics and biogeographical considerations

by Fridgeir Grimsson

2005
Fridgeir Grimsson, Thomas Denk
Review of Palaeobotany and Palynology

Kynlega stór aldin úr síðtertíerum setlögum á Íslandi / Unusually large samaras from Late Miocene sediments in Iceland

by Fridgeir Grimsson

2005
Fridgeir Grimsson, Leifur A Simonarson, Walter L Friedrich
Natturufraedingurinn

Combined LM and SEM study of the Middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin: Part II. Pinophyta (Cupressaceae, Pinaceae and Sciadopityaceae)

by Fridgeir Grimsson

2011
Fridgeir Grimsson, Reinhard Zetter
Grana

Combined LM and SEM study of the Middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin: Part I. Bryophyta, Lycopodiophyta, Pteridophyta, Ginkgophyta, and Gnetophyta

by Fridgeir Grimsson

2011
Fridgeir Grimsson, Reinhard Zetter, Christian Baal
Grana

Gondwanan floristic and sedimentological changes during the Permian-Triassic transition: new evidence from the Amery Group, northern Prince Charles Mountains, East Antarctica

by Sofie Lindström

Co-authored with Stephen McLoughlin and Andrew N. Drinnan
Published in Antarctic Science 1997

The Permian-Triassic boundary within the Amery Group of the Lambert Graben is placed at the contact between the... more The Permian-Triassic boundary within the Amery Group of the Lambert Graben is placed at the contact between the Bainmedart Coal Measures and overlying Flagstone Bench Formation, based on the first regular Occurrence of Lunatisporites pellucidus and the first appearance of Aratrisporites and Lepidopteris species. The Permian-Triassic boundary is marked by the extinction of glossopterid and cordaitalean gymnosperms, and by the disappearance or extreme decline of a range of gymnospermous and pteridophytic
palynomorph groups. Earliest Triassic macrofloras and palynofloras of the Flagstone Bench Formation are
dominated by peltasperms and lycophytes; corystosperms, conifers, and ferns become increasingly common elements of assemblages through the Lower Triassic part of the formation and dominate floras of the Upper Triassic strata. The sedimentary transition across this boundary is conformable but marked by a termination of coal deposits; overlying lowermost Triassic sediments contain only carbonaceous siltstones. Typical redbed facies are not developed until at least 100 m above the base of the Flagstone Bench Formation, in strata
containing ?Middle Triassic palynofloras. Across Gondwana the diachronous disappearance of coal deposits and appearance of red-beds is suggestive of a response to shifting climatic belts, resulting in progressively drier seasonal conditions at successively higher palaeolatitudes during the Late Permian to Middle Triassic. The abrupt and approximately synchronous replacement of plant groups at the Permian-Triassic boundary
suggests that factors independent of, or additional to, climate change were responsible for the turnover in terrestrial floras.

Le broyage dans la chaîne de transformation du millet (Panicum miliaceum) : outils, gestes et écofacts

by Bertrand Poissonnier

Co-authored with K. Lunström-Baudais, A.-M. Rachoud-Schneider and D. Baudais
2002, Published  In : Procopiou H. & Treuil R. (dir). Moudre et broyer. I. Méthodes. Actes de la Table-ronde de Clermont-Ferrand, 1995. Paris : Éd. du Comité des travaux historiques et scientifiques, p. 181-209.

Two parallel ethnoarchaeological inquiries were undertaken, one in western Nepal and the other in Vendée (western... more Two parallel ethnoarchaeological inquiries were undertaken, one in western Nepal and the other in Vendée (western France), in order to reconstitute the sequence of operations traditionally employed for processing millet (Panicum miliaceum). Our field work underscored not only the common central role played by the mortar/pestle at the dehusking stage but also revealed two major facultative variations which may be employed to increase the efficacy of mortar/pestle pounding. Thermic treatment before pounding may be applied; this can be a simple heating operation or may include the addition of water to the grain during the heating. Technical improvements of the active head of the pestle were sometimes practised in Vendée and are systematically practised in western Nepal.
The effects of these facultative variations were experimentally evaluated in terms of time ad quality of the product. Without either a thermic treatment of the seed before pounding or the use of a reinforced pestle head, the work of dehusking millet is laborious, the loss of seed important and the quality of the product low. Both thermic treatment of grain and the use of metal armed pestle were already known in Roman times. Depending on the position of thermic treatment in the operative sequence, this artificial heating can lengthen the storage capacity of hulled cereals.
Our experimentation brought to light a botanical marker of thermic treatment: pollen enclosed within the husks of grain becomes characteristically crumpled when exposed to artificial heating, whether or not water is added at this stage. By dating the eventual appearence of this thermic marker within the husks of grain from water-logged archaeological sites, it will become possible to expand our knowledge of the history of thermic treatment in the processing of hulled cereals.