tephra

Therefore, these communities are less likely to have large amounts of tephra.

No tephra or lava volumes were recorded at this time.

Airborne tephra that has been carried to the east and south of the volcano.

Such a rock was first produced by a volcano, either as lava or tephra.

The tephra was carried by prevailing winds to the east and southeast.

The remainder of the material thought to be tephra was in fact broken lava rock.

A small portion of the erupted tephra was deposited locally.

In summer the climb is difficult due to the loose tephra that gives way underfoot.

These form several layers of tephra constructing the mountain.

For this reason it is less effort to climb in winter when the snow consolidates the tephra.

Structures not built for holding heavy material would likely demolish under the weight of the tephra.

Much of the inland is covered by salt flats, tephra and lava flows.

Evidence from past eruptions indicates large amounts of tephra and lava were produced.

Houses close to the rift were soon destroyed by lava flows and tephra fall.

The trunks were then covered with 80 to 100 C tephra, hot material discharged from the volcano.

Approximately 50% of the island is composed of tephra.

A large volunteer effort was mobilized to clear the tephra - around 1000 man-days by the end of July.

Thus, once the volcanic event has been independently dated, the tephra horizon will act as time marker.

The deposited tephra particulates make the local soil very permeable.

In fact, it's possible for scientists to tell from which hole in the volcano the tephra was taken."

A shorter word for 'pyroclastic fall deposits' is tephra.

In regions of highly active volcanism tephra can periodically blanket the landscape.

Furthermore, water evaporates quickly on the ground and the tephra soil is extremely permeable.

The tephra is dispersed over a wider areas than that from Strombolian eruptions.

Studies have identified four major eruption phases, and one minor precursory tephra fall.