I don't think you could use the Rockies or Andes to be honest.
I'm undecided (or couldn't actually give a piss) though I can see there are plenty of valid arguments for 4, 5, 6, 7, 8+ continents in the world. Global warming will probably make things even more confused.Geologists use the term continent in a different manner than geographers. Rather than simply identifying large land masses, geologists have distinct criteria for identifying continents. Continents are portions of the Earth's crust characterized by a stable platform of Precambrian metamorphic and igneous rock (typically 1.5 to 3.8 billion years old) largely of granitic composition, called the craton, and a central "shield" where the craton is exposed at the surface. The craton itself is an accretionary complex of ancient mobile belts (mountain belts) from earlier cycles of subduction, continental collision and break up from plate tectonic activity. An outward-thickening veneer of younger, minimally deformed sedimentary rock covers much of the rest of the craton. The margins of the continents are characterized by currently-active or relatively recently active mobile belts and/or deep troughs of accumulated marine or deltaic sediments. Beyond the margin, there is either a continental shelf and drop off to the basaltic-rock ocean basin or the margin of another continent, depending on the current plate-tectonic setting of the continent. A continental boundary does not have to be a body of water. Over geologic time, continents are periodically submerged under large epicontinental seas, and continental collisions result in a continent becoming attached to another continent. The current geologic era is relatively anomalous in that so much of the continental areas are "high and dry" compared to much of geologic history.
Bookmarks