Marine tephra layers form important chronostratigraphic markers and may also provide information on eruption dynamics and chronology. |
Southwesterly winds carried the tephra northeast and destroyed a few tens of farms. |
Any such lateral motions could contribute to the absence or thinness of distal marine tephra layers on submarine high points or steep slopes. |
Some reports are stating that that tephra rim could collapse later this year. |
The tephra is classified by size and includes cinders, the volcano's namesake. |
The pyroclastic deposits mainly consist of block-and-ash, blast, tephra fallout and secondary pyroclastic flow deposits. |