seamount and submarine volcano

[kaiiam]

The current envo seamount has exact synonym submarine volcano, upon examination of the wiki submarine volcano page, we see that they are potentially active magma-releasing volcanoes, whereas seamounts are formed from volcanic activity, but (as far as I can tell) aren't active. @pbuttigieg should we perhaps change the exact synonym in seamount away from submarine volcano and make a new submarine volcano class?

[pbuttigieg]

I believe seamounts can indeed host active volcanism, but yes : we should separate these entities.

A submarine volcano need not be an elevation.

[kaiiam]

Cross link to #672.

[kaiiam]

Changes proposed:

for ENVO:seamount

remove the exact synonym submarine volcano

Create new class: submarine volcano

From the Submarine_volcano wiki page we have:

Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt.

Hence perhaps we make it subclass to ENVO:volcanic fissure?

Definition:

A volcanic fissure which is located within an oceanic basin.

Axiom:

'located in' some 'oceanic basin'

Thoughts?