northern boundary of Gondwanaland冈瓦纳大陆北界
N（名词） one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago, comprising chiefly what are now Africa, South America, Australia, Antarctica, and the Indian subcontinent 冈瓦纳大陆; 大约2亿年前由泛大陆分离成的两个古代超级大陆之一，主要包含现在的非洲、南美洲、澳洲、南极洲和印度次大陆