Morphology and stratigraphic relationships of the Wiluna hardpan in arid Western Australia
Morphology and stratigraphic relationships of the Wiluna hardpan in arid Western Australia
复制标题
西澳大利亚干旱地区威卢纳硬盘的形态和地层关系
DOI：
10.1080/00167617408728835
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发表时间：
1974
期刊：
影响因子：
--
通讯作者：
H. M. Churchward
中科院分区：
文献类型：
--
作者：
E. Bettenay;H. M. Churchward
在西澳大利亚干旱的大部分地区，红棕色的硬土层分布在广阔的平原上，它可能位于地表，也可能埋在土壤的浅层之下。由于其岩性特征及其相当大的厚度和范围，建议将其命名为维卢纳Hardpan。拟定的典型剖面位于维卢纳北部，靠近Bulloo唐斯宅基地，阿什伯顿河的溯源侵蚀暴露出30 m深的剖面。虽然可能同时存在铁质和钙质胶结物，但维卢纳硬磐岩大部分被硅石硬化。它比红土年轻，但与钙质结砾岩和长袍豆状岩大致同时代。最初，它在地理上可能受到地形低平的适宜条件和导致间歇性洪水和干燥的气候的限制。其现今分布部分受现今侵蚀和沉积作用的控制。
Abstract Over much of arid Western Australia a red and brown hardpan occurs on broad plains; it may lie either on the surface or buried beneath a shallow mantle of soil. It is proposed that, because of its lithological character and its considerable thickness and extent, it should be given the name of Wiluna Hardpan. The proposed type section is north of Wiluna, near Bulloo Downs homestead, where headward erosion of the Ashburton River is exposing sections 30 m deep. Although both ferruginous and calcareous cement may be present, Wiluna Hardpan is largely indurated with silica. It is younger than laterite, but broadly contemporaneous with calcrete and Robe Pisolite. Initially it was probably geographically restricted by a coincidence of suitable conditions of low relief and a climate resulting in episodic flooding and desiccation. Its present distribution is partly controlled by current erosional and depositional processes.