On the distribution of Nothofagus forest through time and space

本研究旨在重现美国奥特斯南部新生代植物区系的建立过程，特别是对南方山毛榉(Nothofagus)的植物地理史进行了研究。在1989年的野外调查中，从南智利XI地区采集了50多个化石木材标本，约120个化石树叶和孢粉标本。这些材料的分类研究为南美洲南部的古植物学提供了许多新的信息和证据。到目前为止，已经从智利奇科的样本中识别出四种石化木材，其中包括三个新物种。在瓜达尔组(渐中新世)和里奥泽巴洛斯组(中新世)中发现了木贼和Nothofagus叶子。在Mina Ligorio Marquez的古新世沉积物中已发现约815种孢粉，包括蕨类孢子、裸子植物和被子植物花粉粒。所有这些材料仍在详细研究中。

This research was aimed to reconstruct the establishment process of the Recent flora in the southern part of Aouth America during the Cenozoic, especially focused on the phytogeographic history of Nothofagus (southern beech). During the 1989 field survey, more than 50 specimens of petrified woods, ca. 120 fossil leaves and palynologicalsamples have been collected from XI region of South Chile.Taxonomic studies using these materials have provided many new informations and evidence to the paleobotany of southern South America. By now four species of petrified woods, including three new species have been recognized from Chile Chico samples. Equisetum and Nothofagus leaves have been identified from the Guadal Formation (Oligo-Miocene) and Rio Zeballos Formation (Miocene). About 815 palynomorphs including fern spores, gymnosperm and angiosperm pollen grains have been recovered from Paleocene sediments at Mina Ligorio Marquez. All these materials are still under detailed study.