Linked from
The 14 pages that link to Tephra, each with the reason it gives.
Volcanic craterRelated: Tephra can be thrown from a crater and accumulate along its rim.
LavaCompared with: Lava remains molten on the surface; tephra travels through the air as fragments.
Cinder coneNarrower topic: Cinders are one size class of the broader material that builds the cone.
Volcanic ventRelated: A vent can eject tephra along with gas and magma.
MaarRelated: Maar explosions eject tephra that accumulates around the crater.
Volcanic coneRelated: Loose tephra can accumulate around a vent to build a cone.
HeklaRelated: Explosive phases at Hekla scatter tephra across Iceland and beyond.