1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Anke Zernack <A.V.Zernack@xxxxxxxxxxxx> Kia ora We are now just two weeks away from the deadline (16 May) for the International Sedimentological Congress that will be held in Wellington, New Zealand in January 2026. Being situated in volcanically active Aotearoa-New Zealand, several sessions will be focused on volcano-sedimentary processes and deposits, including one that has been developed by the IAVCEI Commission on Volcanogenic Sediments. Please consider submitting an abstract to support the much-needed interaction between volcanologists and sedimentologists! *Volcano-sedimentary processes in modern and ancient environments* *Conveners: Anke Zernack, Jonathan Procter, Stuart Mead, Andrea Di Capua, Rebecca Williams* Volcanoes are inherently complex and dynamic geological systems able to generate and distribute vast volumes of sediment to surrounding environments, thereby controlling the evolution of sedimentary systems during their entire lifetime and beyond. Such processes result in the accumulation of primary volcaniclastic deposits, entirely formed by volcanic mechanisms (e.g., pyroclastic density currents), and the subsequent accumulation of a broad spectrum of secondary and volcanic epiclastic deposits triggered by reworking and/or redeposition of volcanic material other secondary landscape-shaping processes (e.g., lahars, debris avalanches, or fluvial). Variations within the produced lithofacies reflect the respective influences of volcanic activity, climate, and geomorphic setting, while features like unconformities and paleosols offer insights into temporal gaps in depositional records. Understanding the origin, transport and emplacement mechanisms of such a wide range of deposits is fundamental for accurately reconstructing accumulation histories of ancient and modern volcano-sedimentary successions, and for assessing future hazards and their potential economic impacts. However, the interpretation of volcaniclastic successions still presents many knowledge gaps that could be reduced by bringing together multidisciplinary experts and methods as well as by combining classical (e.g., field-based works) with novel (e.g., numerical modelling) approaches. This session aims at fostering dialogue between volcanologists, sedimentologists, natural hazard experts, and computer/statistical modelers to discuss recent advances in understanding volcano-sedimentary processes in ancient and modern stratigraphic records and their impact on the environments. We invite contributions that address all aspects of volcaniclastic sedimentation including, but not limited to: - Field studies of volcaniclastic features in ancient sedimentary records aimed at interpreting transport processes and depositional conditions. - Multidisciplinary (e.g., stratigraphic, petrographic, and/or geophysical) studies of modern volcaniclastic sequences as analogue sites. - Statistical and computer modelling approaches focused on depicting physical processes occurring during the accumulation of volcaniclastic deposits. More information about all volcano-sedimentary sessions on offer can be found here: https://confer.co.nz/isc2026/volcano-sedimentary-processes-and-deposits/ <https://urldefense.com/v3/__https://confer.co.nz/isc2026/volcano-sedimentary-processes-and-deposits/__;!!IKRxdwAv5BmarQ!eI64dBGy08liAXBNhb_67rCk3AjAVDXCkc2MUC3ut7WRTqF5PhGIQWKIcQoJHnADMnb4Bmil0W-leblWw9pHBiOUuA$> In addition, we will be running a pre-conference field trip on volcano-sedimentary processes around New Zealandâ??s active andesite and rhyolite volcanoes. For more details follow the link below or feel free to reach out (a.v.zernack@xxxxxxxxxxxx). https://confer.co.nz/isc2026/field-trips/volcano-sedimentary-processes-around-new-zealands-active-andesite-and-rhyolite-volcanoes/ <https://urldefense.com/v3/__https://confer.co.nz/isc2026/field-trips/volcano-sedimentary-processes-around-new-zealands-active-andesite-and-rhyolite-volcanoes/__;!!IKRxdwAv5BmarQ!eI64dBGy08liAXBNhb_67rCk3AjAVDXCkc2MUC3ut7WRTqF5PhGIQWKIcQoJHnADMnb4Bmil0W-leblWw9qOZ_s5Aw$> 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
