The Use of Magnetic-Reversal Time Lines in Stratigraphic Analysis: A Case Study in Measuring Variability in Sedimentation Rates
The Use of Magnetic-Reversal Time Lines in Stratigraphic Analysis: A Case Study in Measuring Variability in Sedimentation Rates
复制标题
磁反转时间线在地层分析中的应用：测量沉积速率变异性的案例研究
DOI：
10.1007/978-1-4612-3788-4_9
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
L. McRae
中科院分区：
文献类型：
--
作者：
N. Johnson;K. A. Sheikh;E. Dawson‐Saunders;L. McRae
已知年龄的磁反转时间线已在巴基斯坦北部波特瓦高原的中中新世 Chinji 组前部 15 公里处追踪到，这提供了一个利用磁反转时间线测量河流序列地层变化的例子。清吉早期沉积物的固有横向波动或不均匀性平均为 28%；垂直波动或沉积不稳定，平均为 41%。这些沉积物积累随地点和时间的波动是中新世时期波特瓦高原上河流系统的特征。
Magnetic-reversal time lines of known age have been traced over a 15 km front of the Middle Miocene Chinji Formation of the Potwar Plateau in northern Pakistan, providing an example by which magnetic-reversal time lines can be used to measure stratigraphic variability in a fluvial sequence. The intrinsic lateral fluctuation, or nonuniformity, of sedimentation during early Chinji time averages 28%; vertical fluctuation, or unsteadiness of sedimentation, averages 41%. These fluctuations in sediment accumulation from place to place and from time to time characterize the fluvial system operating over the Potwar Plateau during Miocene time.