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首页> 外文期刊>South African Journal of Geology: Being the Transaction of the Geological Society of South African: Syndie die Verhandelinge van die Geologiese Vereniging van Suid-Afrika >The place of aeolian coversands in the geomorphic evolution of the southern Cape coast, South Africa
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The place of aeolian coversands in the geomorphic evolution of the southern Cape coast, South Africa

机译：南非南部开普省海岸地貌演化中风沙覆盖的位置

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摘要

The complex geomorphology of South Africa's southern Cape coastal belt comprises Gondwana components and a suite of Quaternary sedimentary deposits, superimposed on the older landscape. Of these, the Wilderness aeolianites have previously been reported. This paper is the second of two which focus on the inland coversands. It has a three-fold purpose. Firstly, it provides new information on the sedimentology and geomorphic context of the coversands. Secondly, it suggests a temporal setting for the emplacement of the coversands. Thirdly, the relationship between the coversands, landscape evolution, the Wilderness aeolianites, and the potential of the coversands to serve as indicators of environmental change are examined. The description is preceded by a synopsis of the development of the southern Cape coastal belt. The gross geomorphology of the region was well established by the Middle Pleistocene, but that landscape has been modified since then, and into the Holocene, by sea level and climatic fluctuations. Evidence for southern Cape Quaternary sand deposits predating MIS 5 is only now emerging. The coversands examined in this paper are demonstrated to be both temporally and spatially discrete from the younger coastal aeolianite deposits. A Middle Pleistocene age is tentatively ascribed to the coversands.
机译：南非南部开普省沿海带的复杂地貌由冈瓦纳组成部分和一系列第四纪沉积沉积物叠加在较旧的景观上。其中，以前曾报道过荒野风成岩。本文是针对内陆覆盖物的两篇中的第二篇。它具有三个目的。首先，它提供了有关盖层沉积学和地貌背景的新信息。其次，它暗示了覆盖物放置的时间设置。第三，研究了覆盖物，景观演变，荒原风化岩和覆盖物作为环境变化指标的潜力之间的关系。在描述之前，先介绍南开普省沿海带的发展概况。该地区的总体地貌由中更新世很好地建立起来，但此后，由于海平面和气候波动，该景观已被修改为新世。 MIS 5之前出现的南部开普第四纪砂沉积物的证据才刚刚出现。本文研究的覆盖物在时间和空间上都与较年轻的沿海风成岩沉积物不相关。尝试将中更新世年龄归因于覆盖物。

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