Publications

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Episodic migration of oaks to Iceland: Evidence for a North Atlantic “land bridge” in the latest Miocene – 2010

Authors: Thomas Denk, Friðgeir Grímsson, Reinhard Zetter Dating the subsidence history of the North Atlantic Land Bridge (NALB) is crucial for understanding intercontinental disjunctions of northern temperate trees. Traditionally, the NALB has been assumed to have functioned as a corridor for plant migration only during the early Cenozoic, but recent findings of plant fossils and [...]

By | February 5th, 2010|Publications|0 Comments

Íslands fornu skógar – 2008

Authors: Friðgeir Grímsson, Leifur A. Símonarson Nú á dögum fer frekar lítið fyrir náttúrulegum íslenskum skógum og heldur eru þeir snauðir af tegundum, enda bera þeir þess greinileg merki að vaxa á mörkum kuldabeltisins og tempraða beltisins. Einu tegundirnar sem voru hér þegar land byggðist og mynda eiginleg tré eru birki (Betula pubescens Ehrh.) og [...]

By | October 30th, 2008|Publications|0 Comments

Upper Tertiary non-marine environments and climatic changes in Iceland – 2008

Authors: Friðgeir Grímsson, Leifur A. Símonarson Palaeontological research on the Miocene and Pliocene floras and faunas of Iceland date back to the 1770’s. At that time, plant fossils from Iceland were considered belonging to a single flora, and in the early 20th century scientist considered this flora of Eocene age. During the past few decades systematic [...]

By | July 31st, 2008|Publications|0 Comments

Pollen, fruits, and leaves of Tetracentron (Trochodendraceae) from the Cainozoic of Iceland and western North America and their palaeobiogeographic implications – 2008

Authors: Friðgeir Grímsson, Thomas Denk, Reinhard Zetter Dispersed pollen, fruits, and leaves of Tetracentron (Trochodendraceae) are described from the Miocene of Iceland and assigned to a new species, Tetracentron atlanticum. The Icelandic fossils represent the first unambiguous record of Tetracentron for the Cainozoic of Europe. Well-preserved dispersed grains of Tetracentron are also identified from the [...]

By | April 24th, 2008|Publications|0 Comments

Floristic turnover in Iceland from 15 to 6 Ma – extracting biogeographical signals from fossil floral assemblages – 2007

Authors: Friðgeir Grímsson, Thomas Denk This study aims to document the floristic changes that occurred in Iceland between 15 and 6 Ma and to establish the dispersal mechanisms for the plant taxa encountered. Using changing patterns of dispersal, two factors controlling floristic changes are tested. Possible factors are (1) climate change, and (2) the changing [...]

By | September 24th, 2007|Publications|0 Comments

Elstu Flórur Íslands / Late Langhian to early Serravallian floras of Iceland – 2007

Authors: Friðgeir Grímsson, Leifur A. Símonarson, Thomas Denk Í greininni er lýst eins nákvæmlega og unnt er plöntusamfélögum úr elstu setlagasyrpum á Íslandi, en þær eru taldar 15 og 13,5 milljón ára. Allmargar plöntutegundanna sem hér verður fjallað um hafa ekki verið greindar áður úr íslenskum jarðlögum og sagt er frá nýrri tegund af linditré sem [...]

By | August 24th, 2007|Publications|0 Comments

Síðmíósen Setlög við Hreðavatn / Late Miocene sediments at Lake Hreðavatn – 2007

Author: Friðgeir Grímsson Í Borgarfirði á Vesturlandi eru varðveitt víðáttumikil setlög frá síðmíósentíma, um það bil 7–6 milljón ára gömul. Þessar jarðmyndanir hafa verið nefndar Hreðavatnssetlögin eða bara Hreðavatnslögin. Setlögin eru mjög fjölbreytt að útliti og gerð vegna þess að sum hafa myndast úr rofefnum, önnur eru gosræn og loks eru setlög mynduð við starfsemi [...]

By | July 31st, 2007|Publications|0 Comments

Middle Miocene floras of Iceland — the early colonization of an island? – 2007

Authors: Friðgeir Grímsson, Thomas Denk, Leifur A. Símonarson Two macrofloras, 15 and 13.5 Ma old, are described from the oldest exposed plant bearing sediments on Iceland. Many of the taxa are mentioned for the first time and a lime tree, Tilia selardalense, is described as a new species. In case of the older flora, differences [...]

By | May 24th, 2007|Publications|0 Comments

Beyki úr Íslenskum Setlögum / Beech (Fagus) from Icelandic sediments – 2006

Authors: Friðgeir Grímsson, Leifur A. Símonarson Laufblöðum, aldinum og fræjum sem tilheyra ættkvíslinni beyki (Fagus) hefur verið lýst úr þremur setlagasyrpum á Vestfjörðum. Í fyrsta lagi úr Selárdals–Botns setlagasyrpunni, en hún er talin um 15 milljón ára, þá úr Dufansdals–Ketilseyrar setlagasyrpunni, sem er líklegast um 13,5 milljón ára, og loks úr Skarðsstrandar–Mókollsdals setlagasyrpunni sem er 9–8 milljón [...]

By | May 26th, 2006|Publications|0 Comments

The Miocene floras of Iceland and their significance for late Cainozoic North Atlantic biogeography – 2005

Authors: Thomas Denk, Friðgeir Grímsson, Zlatko Kvaček A large number of plant macrofossils from several Middle to Upper Miocene localities from Iceland have been studied. The fossil material includes four ferns and fern allies, seven conifers, and about 40 species of flowering plants. Betula islandica and Salix gruberi are described as new species. Coniferous twigs [...]

By | December 15th, 2005|Publications|0 Comments