Nannou, that wiki article is confusing for newbies and also wrong.
A continent is the landmass of a single tectonic plate, it isnt like calendars or new years or imperial and metric where you can choose different systems, the reality of it is there are only set continents with set boundry's.
Also Though europe is often considored a seperate continent culturally and politically and what-not, it is still very much part of the asian continental plate, hence it is a single continent.
The smaller plates in Bossels image, though seperate plates, are oceanic plates, and arent considored continents, to qualify as a continent you must have a large land mass above water, with continental crust as its called.
Microcontinents
Microcontinents include Madagascar, the Seychelles (the northern Mascarene Plateau), New Zealand, and New Caledonia. Note that volcanic Iceland is an exposed bit of oceanic crust at the mid-ocean ridge, and therefore not a microcontinent.
New zealand is part of the oceanic/australasian/australian plate, microcontinents are just a cute little imaginary concept, the only reason new zealand exists is because it has formed near the end of the oceanic plate, i cant remember if the oceanic plate is moving into the pacific plate or moving away, either way they are just like every other island chain that forms on or near the edge of a plate edge.
Either by magma and volcanos forming where two crusts are moving away from each other or where one crust is forced under another it is moving into, and pushes the crust of the other plate up at the edge it is moving into.
