The unknown cooling-rate history of natural silicate melts can be investigated using differential scanning heat capacity measurements together with the limiting fictive temperature analysis calculation. There are a range of processes occurring during cooling and re-heating of natural samples which influence...
Relaxation geospeedometry has been applied to two series of clastogenic obsidian flows on Tenerife to determine their thermal history across the glass transition. The phonolite flows investigated were both generated by lava fountaining activity followed by rheomorphism of the deposits. The detailed ...
Relaxation geospeedometry using differential scanning calorimetry (DSC) has been applied to quantify the cooling history across the glass transition of flow ramps at the front of the calc-alkaline rhyolite Rocche Rosse flow of Lipari, Aeolian Islands, Italy. Modelled cooling rates for the obsidian ...
The thermal history of natural glasses is critical to understanding a wide range of geologic processes. Relaxation geospeedometry has been used to infer the cooling rate of naturally formed glasses across a wide range of compositions and geologic settings. However, using the Tool-Narayanaswamy (TN...
Thermal history alone suggests that large, thick lava flows could remain active for several decades.To constrain the duration of flow advance of these units, their inferred apparent viscosities are compared with those of active lava flows. Mean flow velocity of some large rhyolites in southwestern ...
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