古赤道(paleoequator)是地史时期一定阶段的地球赤道。古地球赤道的位置,是根据古地磁、氧同位素比、古动植物群和珊瑚礁分布,煤矿床、冰碛层,以及其他地质证据来确定的。古赤道过去曾经是和旋转轴垂直的—个大圆,由于经过大陆位移,某个大陆的古赤道方向可以与现代赤道迥异。
北美晚古生代钾盐大规模集中成矿作用,也与该时期北美大陆古赤道位置密切相关。
The extensive deposition of potash salts in North America in Paleozoic Era was associated closely with the position of paleoequator.
新生代板块构造旋回早期藏南—印度古陆从冈瓦纳大陆裂解出来,从南半球向赤道漂移;
During early Mesozoic—Cenozoic cycle, south Tibetan—Indo protocontinent was disintegrated from the Gondwana, drifting toward the equator from southern hemisphere;
应用推荐