The last glacial period is divided into two stadial stages with an interstadial stage.Evolution of lakes of the source area during the Quaternary went through three stages.
黄河源区的
期可划
为3期，即末次期、倒
第二次期、倒第三次期，末次期又可为2个阶。
退阶段期的The last glacial period is divided into two stadial stages with an interstadial stage.Evolution of lakes of the source area during the Quaternary went through three stages.
黄河源区的期可划为3期，即末次期、倒第二次期、倒第三次期，末次期又可为2个阶。
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