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在加拿大不列颠哥伦比亚中部弗雷泽河出露的渐新世沉积中发现了微体植物化石。该沉积是弗雷泽河系的一部分,由泥岩、砂岩、砾岩、褐煤互层组成。组合中最常见的成分是Ouercus, Alnus Carya,Liquidambar,Ulmus Zelkova,Juglans,Pterocarya,Osmunda,和Taxodiaceae的成员,偶尔还见有Engelhardtia,Prosopis,? Psilotum,Ephedra,和?Dorstenia。该组合指示的是温带至亚热带的暖温气候。有人认为,西部低缓的海岸山脉,东部高峻的落基山脉,以及一个温暖的极海可能是造成这种气候的原因。在该孢粉组合中共发现了一个新属,十一个新种。其中包括Prosopis quesneli,Diervilla echinata,Triporate B,和Taxodium rousei在内的几个种,这几个种似乎仅限于这段沉积,故可用作加拿大西部渐新统很好的指示化石。
Microfossil fossils have been found in Oligocene sediments exposed on the Fraser River in central British Columbia, Canada. The deposition is part of the Fraser River system and consists of mudstone, sandstone, conglomerate and brown coal interbed. The most common ingredients in the mix are members of the families Ouercus, Alnus Carya, Liquidambar, Ulmus Zelkova, Juglans, Pterocarya, Osmunda, and Taxodiaceae, with occasional Engelhardtia, Prosopis, Psilotum, Ephedra, and Dorstenia. The combination indicates a warm temperate to subtropical zone. Some people think that the slow coastal west of the mountains, the east of the high rocky mountains, and a very warm sea may be the cause of this climate. In the sporopollen assemblage, a new genus, eleven new species were discovered. Several species, including Prosopis Quesneli, Diervilla echinata, Triporate B, and Taxodium rousei, appear to be limited to this sediment and may therefore be used as good indicator fossils of the Oligocene in Western Canada.