中国北方早白垩世被子植物花粉的研究

• 作 者: 余静贤
• 机 构: 中国地质科学研究院地质研究所,
• 出 处: 地层古生物论文集
• 发表日期: 1990年00期
• 关键词: 植物花粉 花粉保存 土井子组 陆地植物 植物类群 热河群 左云组 克孜勒苏群 地史 赤道轮廓

一、前言被子植物自白垩纪中期崛起以后,就以其无比的优越性在与其它植物类群的生存竞争中迅速发展,演化至白垩纪晚期时,已成为陆地植物的主导者。但早期的被子植物都是什么类型,其生态环境又怎样,又是怎样发展演化的,始终是科学家们极为关注的问题。国外的研究表明,地史上早期被子植物花粉保存为化石的数量和完好度都优于被子植物叶化

I. INTRODUCTION After the rise of Cretaceous in mid-term, angiosperms have developed rapidly in competition with the survival of other plant groups due to their incomparable superiority. They have become the dominant species of terrestrial plants in the late Cretaceous. However, what types of early angiosperms are their ecological environment, but also how to develop and evolve, it is always a matter of great concern to scientists. Foreign studies show that the early history of pollen preserved in the history of fossils as the number and integrity are better than the angiosperm annulation