DOI: 10.1029/2004jf000197
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Abstract: [1] Pyroclastic flows and snow avalanches sometimes exhibit a rapid deceleration of their dense flow fronts and detachment of their dilute clouds. This behavior is also inferred for submarine flows and could explain stepped thickness patterns in their deposits. A similar ''abrupt transition'' process occurs in particle-laden, lock release laboratory currents with relatively high concentrations. New experiments on nonparticulate, solutedriven density currents were run to investigate the cause of abrupt transit…

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