Hi,

I'm not sure we have to put in osm so detail informations : on wikipedia, there is one page for dike, not 2. In taginfo, only 2 values (before my change, 1 value and 1 magmatic_dike).
A magmatic_dike is a dike.
There are probably hundred of places with dike in the world, but only 2 places in osm have this information.
I think to have one value is enough.

Best regards.