A
supercontinent is a mass of land comprising more than one
continent.
Since the definition of continent is arbitrary, the definition of supercontinent
is also arbitrary.
Present day supercontinents are Eurasia, Africa-Eurasia, and The Americas.
In geological time other supercontinents existed, including:
- Euramerica?
- Gondwana?
- Rodinia?
- Pangea?
- Pannotia?
Maps are available at http://www.cscotese.com/earth.htm