THIS footprint is part of one of two seriesof fossil tracks found recently in Kenya in rocks that are 1.5m years old.
这个脚印来自两组化石脚印中的其中一组,最近在肯尼亚一些有150万年历史的石头上被发现。
2
But to the east, the rocks have buckled into a seriesof steep north-south ridges, cutting down through the heart of Yunnan, the parallel mountains of the Hengduan Shan.
It is a product of volcanic rocksof the mesozoic era over-saturated with silica and rich in potash. it can be compared with geode natrolite that producedin alkaline basalt series of the cenozoic era.