They date from the early Cretaceous period, which began around 145 million years ago and ended 65 million years ago.
据悉，他们最早生活在白垩纪早期，亦即1亿4千5百万年前到6千5百万年前。
Its discovery pushes back the date of when flowering plants diversified to around 127 million years ago, during the early Cretaceous period.
这项发现将开花植物开始多样化的时间推到了大约一亿两千七百万年前，那时正是白垩纪的早期。
Wang says that sediments in the areasuggest that the pterosaurs died in a large storm about 120 million years agoin the Early Cretaceous period.
王晓林还从该地区的沉积物推测道：“在大约1.2亿年前的白垩纪早期，一场强大的风暴夺走了这些翼龙的生命。”
The research result shows:Badaohao Formation - coal-bearing strata - in Badaohao Coal Basin is of early Cretaceous Period and can be correlated to Shahai Formation in Fuxin Basin.
研究结果表明：区内八道壕煤盆地的含煤地层八道壕组属早白垩世，可与阜新盆地的沙海组对比。
In Hunan province, it took place in the period between early-middle stage and late stage of late Cretaceous epoch. Its structural features are angular disconformity or paraconformity.
湖南晚燕山运动发生于晚白垩世中早期与晚白垩世晚期之间，其构造形迹为角度不整合及假整合关系。
In Hunan province, it took place in the period between early-middle stage and late stage of late Cretaceous epoch. Its structural features are angular disconformity or paraconformity.
湖南晚燕山运动发生于晚白垩世中早期与晚白垩世晚期之间，其构造形迹为角度不整合及假整合关系。
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