Pollen Succession in the Sediments of Singletary Lake, North Carolina
Pollen Succession in the Sediments of Singletary Lake, North Carolina
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北卡罗来纳州 Singletary 湖沉积物中的花粉演替
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发表时间：
1951
期刊：
影响因子：
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通讯作者：
D. G. Frey
中科院分区：
文献类型：
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作者：
D. G. Frey
作者试图根据沉积物的堆积来解释北卡罗来纳州沿海平原某些天然湖泊复杂的个体发育过程，并对湖泊中的动植物遗骸进行了分析。花粉和孢子，主要是气生植物的花粉和孢子。是迄今为止这些沉积物中所有微体化石中最丰富的，由于它们的多样性和很长时间的积累，它们提供了确定沉积物相对总年龄以及将盆地不同部分的沉积物与同期性相关联的绝佳手段。北美东部的花粉研究主要局限于冰川部分，因为那里有大量充满泥炭沉积物的冰川盆地。在冰川边界以南，类似的研究很少，而且分散。刘易斯和科克（1929年）以及科克、刘易斯和帕特里克（1934年）的第一篇文章描述了弗吉尼亚州德拉蒙德湖附近的迪默沼泽近期沉积物中不同层次的花粉和孢子。Buell（1945）对Singletary湖附近的杰罗姆湾的沉积物进行了一些调查，但从未对他的发现发表任何全面的定量说明。Cain（1944）报道了南卡罗来纳州一些埋藏土壤中的花粉含量，但目前还无法将这些花粉含量纳入该地区的总体年代学，以确定它们的相对年龄。西尔斯（Sears，1935）给出了几张阿肯色州和田纳西州东部的图表。达林顿（1943）在西弗吉尼亚州的一个沼泽中记录了花粉序列。Potzger（1945）展示了几幅来自新泽西南部的图表。最后，Potzger和Tharp（1947）展示了德克萨斯州一个沼泽的重要花粉图。这些分析仍然过于分散，而且往往过于零碎，以至于人们无法得出概括性的结论，或者试图在冰川边界以南找到已经为冰川地区确定的几个冰后期气候时期。(See Deevey（1949）对这个问题进行了回顾。）可以做的一个概括是，所有这些南方的图表都延伸到足够远的地方，在最低层显示云杉，有时是冷杉。据推测，这些层位来自更新世。
In ail attempt to unravel the complicated ontogeny of some natural lakes in the North Carolina Coastal Plain on the basis of their accumulated sediments, the writer was led into the analysis of the plant and animal remains contained ill them. Pollens and spores, primarily those of aerial plants. are by far the most abundant of all microfossils in these sediments, and because of their diversity and very long period of accumulation they afford an excellent means of determining the relative total age of the sediments and of correlating the sediments from various parts of the basin as to contemporaneity. Pollen studies in eastern North America have been confined largely to the glaciated portion because of the abundance there of glacial basins filled with peat deposits. Similar studies south of the glacial boundary are few and scattered. The first of these by Lewis and Cocke (1929) and later by Cocke, Lewis, and Patrick (1934) describes the pollen and spores at various levels in the recent deposits of the Dismal Swamp near Lake Drummond in Virginia. Buell (1945) made some investigations on the sediments of Jerome Bay near Singletary Lake, but never published any comprehensive quantitative account of his findings. Cain (1944) reported on the pollen content of some buried soils in South Carolina, but these at present cannot be fitted into an overall chronology of the region for the determination of their relative age. Sears (1935) presented a few diagrams for Arkansas and eastern Tennessee. Darlington (1943) recorded the pollen sequence in a bog in West Virginia. Potzger (1945) shows a few diagrams from southern New Jersey. And finally, Potzger and Tharp (1947) present a significant pollen diagram from a bog in Texas. These analyses are still too scattered and often too fragmentary for one to draw generalizations or to try to find south of the glacial boundary the several postglacial climatic periods that have been established for the glaciated region. (See Deevey 1949, for a review of this problem.) The one generalization that can be made is that all of these southern diagrams which extend back far enough show spruce, and sometimes fir, in the lowermost horizons. It has been surmised that such horizons are from the Pleistocene.