RST 2023 : geosciences and the environment

Where environmental issues are discussed
Couvent des Jacobins, Rennes

The pictures of this event are downloadable on this page, just on the right


28th RST (Réunion bisannuelle des Sciences de la Terre) took place from 28 October to 3 November 2023 at the Palais des Congrès in Rennes at the Couvent des Jacobins. It was co-organized by the UMR Geosciences Rennes and the Geological Society of France, with the support of many partners: the University of Rennes, the CNRS (INSU), Rennes Métropole, among others. This conference brought together more than 800 participants throughout the week. More than 70 colleagues from Geosciences (researchers, PhD students, postdoctoral fellows, technical and administrative staff) actively participated in the organization and scientific exchanges throughout this congress.

The congress was organized into three items: 9 field trips (28, 29 and 30 October) and an excursion of the urban geology of Rennes (31 Oct, 1 and 2 Nov), 17 scientific topics (30 to 3 November) and 3 forums (1 and 2 November).

Field trips allowed 125 participants to discover the geology of the Armorican Massif, from aspects of biodiversity of the Cambrian, to mineral resources available in Brittany, through the geodynamics of the Hercynian chain, the Cenozoic sedimentary evolution of the Vilaine, and hydrology. Note the geological walks in the city of Rennes that allowed 75 delegates to discover the geological riches of the city.

The 17 scientific topics covered covered 65 specialized sessions with oral presentations (541) and posters (170) exposed during 2 privileged slots. The topics were co-directed by at least one host from Rennes and an external academic colleague.

The topic on the dynamics of the lithosphere was the most followed with more than 150 presentations, which corresponds to the historical theme of the laboratory. Two new themes were addressed: hydrology and environmental geochemistry, illustrating the most recent orientations of geosciences. They met with great success with many presentations. Note also a session devoted to the carbon footprint of research with a workshop for reflection and discussion

Forums are events dedicated to a particular audience:   The forum "Professions" mainly concerned students by presenting them with the various training courses in Earth Sciences and allowing them to meet partners from the private sector and thus discuss employment dynamics in the different sectors of Earth Sciences.

The forum "Teach Geosciences" was aimed at secondary school teachers and was organized in collaboration with the Academy of Rennes. 60 participants attended this forum. This last one covered 3 days: two days of field trips in the bay of Mt St Michel and on the site of Ploumanch allowed the participants to confront themselves with remarkable geological objects. A day in the classroom was devoted to pedagogy and didactics in Earth Sciences but also presented to teachers tools at their disposal as part of their continuing education for the implementation of their future teachings.

The forum «Geoheritage» was held on the 1st afternoon and on November 2nd in the form of 4 sessions with nearly 40 interventions. The excursion to the island of Groix scheduled for 3 November had to be cancelled because of the weather conditions preventing the sea crossing. The participants were able to exchange on the management of collections and geoparks at the regional and national levels, on pedagogy in front of the general public but also on the scientific news around geoheritage and geoarchaeology. A visit to the Museum of Geosciences and the collections of our laboratory was also offered.

On the sidelines of the congress, two public events took place: the first took place on October 24 at the Espace des Sciences with the conference of E. Chemillon (professor at the University of La Rochelle) on the rise of the sea level and its consequences on coastal management, and the second during the congress was a documentary-debate around the film «The battle of the climate». This public event was a great success with 300 people. The screening took place with the directors of the film.

21 exhibitors benefited from a large dedicated space throughout the congress to present their products, their school or their organization. The exchanges with the delegates were facilitated by the coffee breaks that took place in the same hall.

The operational organization of the congress was coordinated by the congress managers of this RST of Geosciences and the team of the SGF with the indispensable support of about sixty student volunteers mainly from the University of Rennes, in Bachelor, Master and PhD. These included hosting delegates, organizing posters, providing technical support in the session rooms and accompanying delegates throughout the week to make the most of this congress.

Communication on social networks was provided by 2 colleagues from OSUR and Geosciences, in support of the SGF and by the communication services of the regional delegation of the CNRS and the University of Rennes. Thus two interviews were given to the daily news paper Ouest-France and the radio RCF

the round-table discussion

The 28th RST held a round table on major national programmes. Its objective was to allow exchanges between those responsible for these major national programmes and researchers.

Stéphane Guillot (Deputy Scientific Director of the INSU Solid Earth domain) introduced the session by presenting the general policy of national and INSU science programs. Then 10 speakers presented their program (5 PEPR, 3 Research Groups, a Thematic Network and 1 Research Infrastructure), each intervention being followed by an exchange with the public. Here is the schedule of the speakers with a link to download the presentations.

14h00 Introduction by Stéphane Guillot

Part One: PEPR
Jean-Raynald de Dreuzy : PEPR OneWater - Eau bien commun
Pierre Nehlig : PEPR underground
Gilles Grandjean : PEPR IRIMA
Alessandro Morbidelli :  PEPR Origins
Mathilde Cannat : PEPR Deep sea bed
second part: GDR and other programs
Jérémy Melleton : project Geological service for Europe
Emilie Ostanciaux : Form@ter
Pascale Bauda & Dominique Guyonnet GDR: the ecological transition of former stockpile mining (TAEMA)
Guillaume Galliero GDR HydroGEMM H2 underground
Christelle Tibéri : GDR Rift