Identification of Carboniferous (320 Million Years Old) Class Ic Amber

被引:92
作者
Bray, P. Sargent [1 ]
Anderson, Ken B. [1 ]
机构
[1] So Illinois Univ, Dept Geol, Carbondale, IL 62901 USA
关键词
NATURAL RESINS; GEOSPHERE; PYROLYSIS; CONIFERS; FATE; COAL;
D O I
10.1126/science.1177539
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The presence of amber, the fossil form of the resins produced by many types of higher plants, has been reported from many localities in Mesozoic and Cenozoic rocks. We have found Class I (polylabdanoid) amber in Carboniferous sediments dating to similar to 320 million years ago. This result demonstrates that preconifer gymnosperms evolved the biosynthetic mechanisms to produce complex polyterpenoid resins earlier than previously believed and that the biosynthetic pathways leading to the types of polylabdanoid resins that are now typically found in conifers and those now typically found in angiosperms had already diverged by the Carboniferous.
引用
收藏
页码:132 / 134
页数:3
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