Defence of Doctoral Thesis in the Department of Geology
The defence of Ursula Toom's doctoral thesis “Ordovician and Silurian trace fossils from Estonia” will take place on 4th December at 13:00 in room NRG-131.
The thesis deals with the so far little researched fossil group in Estonia - trace fossils, or ichnofossils, which help to reconstruct the evolution of biota and characterise past marine ecosystems and environmental conditions. The work describes the systematics, distribution and diversity of trace fossils of Estonian carbonate rocks. The thesis is based on twelve articles published in various scientific journals during the period 2015-2019. As a result, the number of trace fossil families identified in Estonia increased to over 50 (instead of the previously known 15), and several taxa were identified from the Baltica Palaeocontinent for the first time. The results indicate that the latter was a key region in the evolution of the diversity of ichnofossil communities and especially of the bioerosional trace fossils in the Ordovician era.
The opponents of the doctoral thesis are Professor Luis Buatois from the University of Saskatchewan in Canada and Senior Researcher Oive Tinn from the University of Tartu. The Defense Committee is headed by Atko Heinsalu, Director of the Department of Geology.
Everyone is welcome to participate !