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Fig. 9 | Earth, Planets and Space

Fig. 9

From: Lahar characteristics as a function of triggering mechanism at a seasonally snow-clad volcano: contrasting lahars following the 2014 phreatic eruption of Ontake Volcano, Japan

Fig. 9

Field photographs of the April ROS-triggered lahar deposits. MF: October lahar deposits, p.e.: pre-eruptive fluvial deposits, and ROS: April lahar deposits. a Retreated bank (arrow) showing high erosional character of the lahar flow. b Exhumed pre-eruptive terrace deposits and the October lahar deposits. c The ROS lahar terrace (Loc. 1227) developed into the October lahar deposits overlying the pre-eruptive fluvial deposits. d Close-up of c. e Massive to very crudely stratified ROS deposits indicative of hyperconcentrated flow deposition (Loc. 1229). f Thin ROS lahar deposits (overbank facies) overlying the October lahar deposits (Loc. 1199). g Distal end of the ROS deposits. The deposits are well sorted and parallel laminated (Loc. 1208)

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