DISTRIBUTION OF ROOTLESS CONES AND LANDFORMS RESULTING FROM WATER-LAVA INTERACTIONS AT HAGI IN THE AÐALDALUR VALLEY (ICELAND)

International audience The region of Lake Mývatn and the Aðaldalur Valley in Iceland is known for its high concentration of rootless cones. To study the processes involved in the formation of those volcanic landforms, a 1.1 km² study area rich in volcanic landforms was delineated near the Hagi guest...

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Bibliographic Details
Main Authors: Leyrit, Hervé, Ottavi Pupier, Elsa, Le Bivic, Rejanne, Bourrier, Emeline, Mathieu, Gaelle, Dujany, Arnaud, Duquennoy, Julien, Denis, Maxime
Other Authors: UniLaSalle, Bassins - Réservoirs - Ressources - U2R UPJV-UNIL 7511 (B2R), Université de Picardie Jules Verne (UPJV)-UniLaSalle, Fondation Dassault Systèmes, Association des Sédimentologistes Français, https://asf-lille-2024.sciencesconf.org/data/pages/ASF2024_Livre_des_resumes.pdf
Format: Conference Object
Language:English
Published: CCSD 2024
Subjects:
Hydrovolcanism
Rootless cone
Laxa lava
Iceland
Myvatn
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology
Aðaldalur
Laxa
Mývatn
Online Access:https://hal.science/hal-04920162
https://hal.science/hal-04920162v1/document
https://hal.science/hal-04920162v1/file/Bourrier%20et%20al_Poster_ASF_rootless_cones%202024.pdf
Description
Summary:International audience The region of Lake Mývatn and the Aðaldalur Valley in Iceland is known for its high concentration of rootless cones. To study the processes involved in the formation of those volcanic landforms, a 1.1 km² study area rich in volcanic landforms was delineated near the Hagi guesthouse in the Aðaldalur valley. The rootless cones and other facies were referenced, and a high resolution orthomosaic and 3D model were produced using drone acquisition. A new classification of rootless volcanic cones and mounds was produced, as well as an architecture of the Hagi zone. This area is interpreted as a continuous transition of explosive interactions between lava and water followed by a basaltic flow due to depletion of water. Moreover, the lava flow mechanically erodes some of the rootless cones.

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