The first continuous late Pleistocene tephra record from Kamchatka Peninsula (NW Pacific) and its volcanological and paleogeographic implications

Giant Late Pleistocene paleolake in Central Kamchatka depression (Kamchatka Peninsula, Russian Far East)

“…The reconstruction the lake emergence, evolution and drain requires an integrative study of the Late Pleistocene glaciation, volcanic accumulation and tectonic deformations. (Ponomareva et al, 2021). Labels denote major marker tephra layers (bold) and site specific tephra IDs.…”

“…The evolution of Kamchatka landscapes remains poorly known even for the Late Pleistocene. Our recent tephrochronological studies based on the geochemical fingerprinting of volcanic glass particles and AMS 14C dating of host deposits provided a chronological lattice for the last 30 ka (Ponomareva et al, 2021). Dated lacustrine sediments revealed a period of simultaneous lacustrine deposition across the vast areas of the Central Kamchatka depression (CKD) that, together with fluvial topography pattern, indicates the existence of previously unknown giant lake within the CKD (Fig.…”

“…Fig.2. Tephrochronological age model of the mega-lake key sections(Ponomareva et al, 2021). Labels denote major marker tephra layers (bold) and site specific tephra IDs.…”

Tephrostratigraphy of Pleistocene-Holocene deposits from the Detroit Rise eastern slope (northwestern Pacific)

“…At present, tephra layers (mainly of Holocene age) have been observed in continental regions adjacent to the northwestern part of the Pacific Ocean and studied to varying degrees of detail in the soilpyroclastic cover on Kamchatka, Alaska, and the Aleutian and Kuril Islands (Braitseva et al, 1995;Braitseva et al, 1997;Melekestsev et al, 1997;Prueher and Rea, 2001;Zaretskaya et al, 2001;Ponomareva et al, 2004;Pevzner et al, 2006;Ponomareva et al, 2007;Jensen et al, 2008;Addison et al, 2010;Bindeman et al, 2010;Jensen et al, 2011;Kyle et al, 2011;Preece et al, 2011;Preece et al, 2014;Ponomareva et al, 2015b;Davies et al, 2016;Ponomareva et al, 2017;Gorbach et al, 2018;Pinegina et al, 2020;Portnyagin et al, 2020;Zelenin et al, 2020;Ponomareva et al, 2021).…”

“…Additionally, information on the age of more ancient Pleistocene explosive eruptions has been obtained by examining tephra from Quaternary deposits in the Okhotsk and Bering seas, as well as from the northwestern edge of the Imperial Ridge (Cao et al, 1995;Ponomareva et al, 2013a;Ponomareva et al, 2013b;Ponomareva et al, 2015a;Derkachev et al, 2016;Derkachev et al, 2018;Ponomareva et al, 2018;Derkachev et al, 2020;Ponomareva et al, 2021).…”