论文部分内容阅读
加利福尼亚湾是北美和太平洋板块间的大陆断裂作用和地壳迁移所形成的 ,这一过程可能始于１２Ｍａ左右。海湾南部海底扩张始于大约３．６Ｍａ ,通常被认为是半岛向太平洋板块迁移活动的结束。南下加利福尼亚半岛向太平洋板块迁移可能经历了３个不同的演化期 :大约１２～６Ｍａ?
The Gulf of California is formed by continental fractures and crustal migration between the North American and Pacific plates, a process that may begin around 12 Ma. The expansion of the southern seabed in the Gulf started at about 3.6Ma and is generally considered to be the end of peninsula migration to the Pacific. South Pacific coast of the Pacific Peninsula migration to the plate may have gone through three different evolutionary periods: about 12 ~ 6Ma?