期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
中国干旱区形成的古地理过程 被引量:10
1
作者 汪久文 《干旱区资源与环境》 CSCD 1997年第1期1-8,共8页
本文扼要的论述了自第三纪以来我国干旱区形成的原因及古地理过程,并将全过程分为森林化(过程)时期、草原化(过程)时期以及荒漠化(过程)时期,以及每一时期的特征及对现代环境的影响。
关键词 中国 干旱区 古地理过程 森林时期 草原化时期
下载PDF
Natural Conditions of Humanity Appearance and Development in Kazakh Steppe
2
作者 Adilkhan B. Baibatsha 《Journal of Earth Science and Engineering》 2012年第11期648-658,共11页
The first humans (hominids) appeared at about the same geological time in three independent areas: in East Africa, southern Indochina and in the Kazakh steppe. People inhabiting all continents and countries around ... The first humans (hominids) appeared at about the same geological time in three independent areas: in East Africa, southern Indochina and in the Kazakh steppe. People inhabiting all continents and countries around the world descended from hominids that emerged in these three foci then resided elsewhere. The number of people emerged 2-3 million years ago now about 7.0 billion people. They inhabit the planet and the master space. Kazakh steppe, located in the middle of the Eurasian continent, has always had a positive impact on neighboring countries. According to historical geological data obtained in the south near the ridge Karatau, the first people emerged on the territory of Kazakhstan were found about 2 million years ago. Such a conclusion was made on the basis of residual cultural pebble tools of hominids, founded by scientists. As a result of geological survey work carried out in the 1960's there were found some primitive people, starting with the era of"Arystandy culture" and including the Late Paleolithic era in the area of ridges Big and Small Karatau. There had been found the fossil remains of large mammals hunted by hominids around the sites of ancient people. Thanks for these residues the corresponding time of residence of primitive people can be judged from the animal world of the Kazakh steppe. 展开更多
关键词 Anthropogene archaeological humans HOMINIDS settlement of the first people.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部