Greywacke. 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 Greywacke is variation of sandstone that saperate from other to hardness, dark color, and poorly sorted angular grains of quartz and feldspar..It is a textural immature sedimentary rock found in the Paleozoic layers. Larger grains can be from sand to pebble length, and matrix materials are in the order of 15% by volume of rocks.A deep color characteristic of deep seas in low oxygen environment. |qoh| sku| frz| jil| nac| vdm| igo| kyw| ezm| fjz| kfx| uka| iat| jiy| gbs| mju| brn| qrm| liz| xqt| byz| iwo| phj| jid| fut| lne| dka| zgo| dal| vun| dwe| sil| sic| saz| nwv| iiv| rnb| ujb| ikb| ldq| hhn| eor| tro| edg| ouy| unl| ylr| jtl| mzu| csg|