cathaysiana supercontinent大华夏超级大陆
breakup supercontinent超大陆裂解
Rodinia Supercontinent超大陆
American supercontinent美洲
Supercontinent Columbia哥伦比亚大陆
supercontinent RodiniaRodinia超级大陆
Columbia supercontinent超大陆;Columbia超级大陆
pangea supercontinentpangea超大陆
N（名词） a great landmass thought to have existed in the geological past and to have split into smaller landmasses, which drifted and formed the present continents 超大陆