TABLE OF CONTENTS

Letter from the new Editor in Chief

Federico Rossetti

The shallow-sea hydrothermal system at Vulcano Island (Italy): the ‘type locality’ for several transformative discoveries in geobiology

Jan P. Amend (1) & D'Arcy R. Meyer-Dombard (2)

Chemical characterisation of the gases released at Gyali Island, Dodecanese, Greece and preliminary estimation of the CO₂ output

Kyriaki Daskalopoulou (1), Sergio Calabrese (2,3), Antonina Lisa Gagliano (3), Konstantinos Kyriakopoulos (4), Lorenza Li Vigni (3), Manfredi Longo (3), Giovannella Pecoraino (3) & Walter D’Alessandro (3)

New insights into the degassing dynamics of Lago Albano (Colli Albani volcano, Rome, Italy) during the last three decades (1989-2019)

Dmitri Rouwet (1), Giancarlo Tamburello (1), Giovanni Chiodini (1), Giovannella Pecoraino (2), Monia Procesi (3), Tullio Ricci (3), Stefania Venturi (4,5), Alessandro Santi (4), Jacopo Cabassi (5), Orlando Vaselli (4,5), Franco Tassi (4,5) & Antonio Costa (1)

Geochemical characterisation of the alkaline and hyperalkaline groundwater in the Othrys Ophiolite Massif, central Greece

Lorenza Li Vigni (1), Kyriaki DaskaLopoulou (2), Sergio Calabrese (1,3), Francesco Parello (1) & Walter D’Alessandro (3)

Impact of acidic volcanic emissions on ash leaching and on the bioavailability and mobility of trace metals in soils of Mt. Etna

Edda E. Falcone (1), Cinzia Federico (1), Sergio Bellomo (1), Lorenzo Brusca (1), Walter D’Alessandro (1), Manfredi Longo (1) & Sergio Calabrese (1,2)

Continuous monitoring of hydrogen and carbon dioxide at Stromboli volcano (Aeolian Islands, Italy)

Roberto M.R. Di Martino (1), Marco Camarda (1) & Sergio Gurrieri (1)

The first observations of CO₂ and CO₂/SO₂ degassing variations recorded at Mt. Etna during the 2018 eruptions followed by three strong earthquakes

Sergio Gurrieri (1), Marco Liuzzo (1), Giovanni Giuffrida (1) & Guillaume Boudoire (2)

Effect of cement and fly-ash on the geotechnical properties of expansive clay soils

Redi Muci (1), Klodian Skrame (1), Oltion Fociro (1), Marco Mancini (2), Iolanda Gaudiosi (2) & Maurizio Simionato (2)

Boron pollution in the shallow groundwater system from Isola di Castelluccio (central-eastern Tuscany): evidences from a geochemical survey and new remediation perspectives from a recently-installed hydraulic barrier and hydrogeological modelling

Marta Lazzaroni (1), Mattia Ceccatelli (1), Luca Rossato (2), Barbara Nisi (3), Stefania Venturi (1,3), Riccardo Fanti (1), Franco Tassi (1,3) & Orlando Vaselli (1,3)

Vertebrate Trace Fossils: the Congo's Brasilichnium mammaloid fossil footprints

Giuseppe Leonardi (1) & Ismar de Souza Carvalho (2)

Mineralogical and petrographic study of building materials from the Argentario coastal towers (Tuscany, Italy): anthropic evidence of the ancient landscape

Emma Cantisani (1), Fabio Fratini (1), Silvia Vettori (1), Elena Pecchioni (2,1), Laura Chelazzi (3) & Andrea Arrighetti (4)