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地台,又称为陆台Platform),是大陆地壳的构造单元,是地壳上相对稳定的地区,直径可达数百至数千公里,是由地槽旋回转化形成的,基本由两层结构组成,下层为褶皱基底,由强烈褶皱和广泛变质的复杂岩系组成;上层为沉积盖层,由平缓的沉积岩层组成。地台和地盾沉积岩一起组成稳定地块。

基底在前寒武纪就结束地槽旋回转化的为古地台,古生代以后形成基底的为新地台,一般在大地构造学中所称的地台指古地台,新地台习惯被称为褶皱系。

全球地质区域(资料出自USGS
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参见

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参考文献

Parker, Sybil P. (Ed.). 1997. McGraw-Hill Dictionary of Geology and Mineralogy. New York: McGraw-Hill.

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外部链接

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