Age and paleogeographical origin of Dominican amber
Age and paleogeographical origin of Dominican amber
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DOI：
10.1126/science.273.5283.1850
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发表时间：
1996-09-27
期刊：
影响因子：
56.9
通讯作者：
MacPhee, RDE
中科院分区：
文献类型：
--
作者：
IturraldeVinent, MA;MacPhee, RDE
多米尼加琥珀矿床的年龄和沉积历史尚未得到很好的确定。伊斯帕尼奥拉岛存在不同年代的树脂岩，但根据现有的生物地层和古地理数据，多米尼加共和国所有主要的琥珀矿床（包括那些以产生生物包裹体而闻名的矿床）都是在早中新世晚期至中中新世早期（15至2000万年前）的单一沉积盆地中形成的。几乎没有证据表明在时间或空间上进行了广泛的返工或重新沉积。沉积间隔的短暂性（小于 500 万年）提供了一个时间基准，可用于校准琥珀类群的分子进化速率。
The age and depositional history of Dominican amber-bearing deposits have not been well constrained. Resinites of different ages exist in Hispaniola, but all of the main amberiferous deposits in the Dominican Republic (including those famous for yielding biological inclusions) were formed in a single sedimentary basin during the late Early Miocene through early Middle Miocene (15 to 20 million years ago), according to available biostratigraphic and paleogeographic data. There is little evidence for extensive reworking or redeposition, in either time or space. The brevity of the depositional interval (less than 5 million years) provides a temporal benchmark that can be used to calibrate rates of molecular evolution in amber taxa.