Greywacke

（重定向自Wacke）

Photomicrograph of a feldspathic wacke (sandstone). Top image is in plane polarized light (PPL); bottom image is in cross polarized light (XPL). Blue epoxy fills pore spaces.

Photomicrograph of a lithic wacke (sandstone). Top image is in plane polarized light (PPL); bottom image is in cross polarized light (XPL). Blue epoxy fills pore spaces.

Greywacke or Graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or lithic fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock generally found in Palaeozoic strata. The larger grains can be sand- to gravel-sized, and matrix materials generally constitute more than 15% of the rock by volume. The term "greywacke" can be confusing, since it can refer to either the immature (rock fragment) aspect of the rock or the fine-grained (clay) component of the rock.

词汇	wacke
分类	英语词汇英语翻译词典
释义	wacke /'wækə/ 英汉-汉英词典 n. 玄武土,玄岩石词组 \| 习惯用语您要查找的是不是： wake vi. 醒来；唤醒；警觉 vt. 叫醒；激发 wicked adj. 邪恶的；顽皮的；恶劣的；不道德的 wacky adj. 乖僻的，古怪的 wacko adj. 古怪的；发疯的 n. 疯子；怪人 wack n. [美俚]怪人；[英俚]朋友 wacke n. 玄武土; n. (Wacke)人名；(德)瓦克; lithic wacke 岩屑砂岩 basaltic wacke 玄土 lithic subarkosic wacke 长石质岩屑砂岩 lithic arkosic wacke 长石玄武网络短语: feldspathic wacke 长石质瓦克岩 basalt wacke 玄武土 grey wacke 硬砂岩 arkosic wacke 长石玄武土 quartz-free wacke 无石英泥沙岩 quartz wacke 石英泥砂岩 grey wacke weakfish 灰色驼背石首鱼英语百科 Greywacke （重定向自Wacke） Greywacke or Graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or lithic fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock generally found in Palaeozoic strata. The larger grains can be sand- to gravel-sized, and matrix materials generally constitute more than 15% of the rock by volume. The term "greywacke" can be confusing, since it can refer to either the immature (rock fragment) aspect of the rock or the fine-grained (clay) component of the rock.
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wacke /'wækə/

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网络短语:

Greywacke