tephra

Adjective modifier

• volcanic: The grayish volcanic tephra is unique to each eruption and can be identified microscopically.

Modifies a noun

• deposition: Initial results suggest a clear developmental sequence on the flows that have not been disturbed by tephra deposition.
• horizon: The majority of tephra horizons within a sequence can be distinguished on the basis of major or trace element chemistry.
• layer: As the tephra layers can also be accurately dated you have a great series of time points to assign any fossils to.
• deposit: We have applied this UV laser system to the analysis of single shards from Miocene tephra deposits from the Ruby Range in southwest Montana.
• fall: To survey the main building types in the areas principally at risk and to assess their vulnerability to pyroclastic flow and tephra fall damage.
• fallout: The only historical event ( AD 1886 ) erupted 1.3 km3 of purely basaltic tephra fallout killing about 150 people.