Greywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness (6–7 on Mohs scale), dark color, and poorly …

杂砂岩（graywacke）定义为粘土基质含量大于15%的、分选性差、结构成熟度低、泥沙混杂的砂岩，属密度流沉积。 杂砂岩一般富含石英，含量可达50%。 石英一般有棱角，常有明显的波 …

Wacke, sedimentary rock composed of sand-sized grains (0.063–2 mm [0.0025–0.078 inch]) with a fine-grained clay matrix. The sand-sized grains are frequently composed of rock fragments …

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2025年2月25日 · Wacke, or graywacke, is the name applied to generally dark-coloured, very strongly bonded sandstones that consist of a heterogeneous mixture of rock fragments, …

Under the Dunham classification (Dunham, 1962 [1]) system of limestones, a wackestone is defined as a mud-supported carbonate rock that contains greater than 10% grains.

2023年4月23日 · If the rock has between 10 and 50% clay matrix, the rock is called a wacke. Quartz wackes have predominantly quartz surrounded by a mud or clay matrix. In a …

2014年1月1日 · wacke, vake [ (a) A“dirty” sandstone that consists of a mixed variety of angular and unsorted or poorly sorted mineral and rock fragments and of an abundant matrix of clay …

2024年4月24日 · A sandstone with more than 15% silt or clay is called a wacke (pronounced wackie). The terms quartz wacke, lithic wacke, and feldspathic wacke are used with limits …

wacke，英语单词，主要用作为名词，意为“玄武土；人名； (德)瓦克”。 basalt wacke 玄武土. grey wacke 硬砂岩 ; 品牌灰瓦岩酒庄. basaltic wacke 玄土 ; 玄武土 [2] Its main rocks is the …