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Table T1. Classification of volcanic lithologies, Expedition 334.

Size Mixture
Tephra Tuffite Eplicastic deposit
>64 mm Pyroclastic breccia Tuffaceous breccia/conglomerate Breccia/Conglomerate
264 mm Lapillistone/Lapilli tuff Tuffaceous gravel Gravel
64 µm2 mm Coarse ash tuff Tuffaceous sandstone Sandstone
2–64 µm Fine ash tuff Tuffaceous siltstone Siltstone
<2 µm Volcanic dust Tuffaceous volcanic dust Claystone
Amount of pyroclasts (%): ≥75 <75 to >25 ≤25

Modified classification scheme after Fisher and Schmincke (1984).

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