这些裂缝的活动在大约2.5-2.45亿年前，即中生代初期逐渐停止了。
The rift development slowly halted some 250 to 245 million years ago, around the beginning of the Mesozoic Era.
中生代是由恐龙主宰的世界，尽管哺乳动物也在距今2亿年前的化石记录中出现。
The Mesozoic saw the ascendence of dinosaurs, although mammals also appear in the fossil record about 200 million years ago.
云南楚雄盆地位于扬子陆块的西南边缘，为一典型的中生代周缘前陆盆地。
The Chuxiong basin in Yunnan on the southwestern margin of the Yangtze landmass is a Mesozoic peripheral foreland basin.
并讨论了龙门山中段中生代前陆盆地的构造演化历史。
The paper also discusses the structural evolution history of the foreland basin in Mesozoic.
中生代构造快速沉降的沉积体的楔形展布表明盆地具有前陆岩石圈挠曲成因特征；
The Mesozoic rapid tectonic subsidence and wedge shaped sedimentary bodies indicate the origin of lithospheric flexure in the Chuxiong Basin.
依据中国海域地层研究资料，论述了中国海域的前中生代地层和中、新生代地层的研究现状。
On the basis of research data about strata in China sea areas, the current situation of study on pre-Mesozoic, Mesozoic and Cenozoic strata in the sea areas are expounded.
楚雄盆地为中生代形成的典型前陆盆地。
The Chuxiong basin is a typical foreland basin formed in the Mesozoic.
古生代是地质时期的一个时代，从前寒武纪末开始，到中生代初，大约从5.7亿年前到2.25亿年前。
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic, or from about 570 to about 225 million years ago.
并讨论了龙门山中段中生代前陆盆地的构造演化历史。
The paper also discusses the structural evolution history of the foreland basin in Mesoz…
并讨论了龙门山中段中生代前陆盆地的构造演化历史。
The paper also discusses the structural evolution history of the forel…
中生代是地质时期的第二个大时代，从大约2.25亿年前的古生代末延续到约7千亿年前的第三纪初。
The second major era of geological time which lasted from the end of the Palaeozoic era about 225 million years ago, to the start of the Tertiary, some 70 million years ago.
中生代是地质时期的第二个大时代，从大约2.25亿年前的古生代末延续到约7千亿年前的第三纪初。
The second major era of geological time which lasted from the end of the Palaeozoic era about 225 million years ago, to the start of the Tertiary, some 70 million years ago.
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