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- W3088814800 abstract "經三次野外調査,總共採集並分析了七十幾個燧石岩層標本,結果在菲律賓北巴拉地塊的烏松島上僅發現三疊紀放射蟲的存在。與目前已知的放射蟲比對之結果,鳥松島之三疊紀放射蟲大致可區分成四個族群,即一個晚中三疊(late Ladinian),及三個上三疊的族群,(late Carnian,late Norian,and early Rhaetian)。本文旨在描述烏松島三疊紀放射蟲族群中的重要種屬。由於再結晶作用使許多放射蟲保存不良而僅能將其鑑定至屬。但從本研究之結果仍可歸納出以下三點結論:1. 烏松島上之燧石岩層在外觀上與布希安哥島上的燧石岩極爲相似。作者相信其爲理明南康燧石岩(Liminangcong chert)的一部份。2. 在布希安哥島上出現的古生代、侏羅紀及大部分的三疊紀放射蟲族群都未曾在烏松島上被發現。同樣地,在烏松島出現的晚三疊(Rhaetian)族群也尙未在布希安哥島的岩層中觀察到。因此,兩島上所出露的燧石岩層很可能都只是理明南康燧石岩的片斷,但布希安哥島上的岩層跨越的年代較長,而烏松島上可能只保留從晚中三疊紀至晚上三疊紀的部分岩層。3. 烏松島放射蟲族群的發現,除可增進世人對晚三疊紀放射蟲的認識外,並對理明南康燧石岩上三疊岩層之下落提供了具體的證據。" @default.
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- W3088814800 date "1992-05-01" @default.
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- W3088814800 title "TRIASSIC RADIOLARIA FROM USON ISLAND, PHILIPPINES" @default.
- W3088814800 doi "https://doi.org/10.6693/car.1992.3.2" @default.
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