What is Greywacke?
Q: What is Greywacke?
A: Greywacke is a type of sandstone that is hard and dark in color.
Q: What is the composition of Greywacke?
A: Greywacke has different sized grains of quartz, feldspar, and small rock fragments set in a compact, fine clay matrix.
Q: Where is Greywacke mostly found?
A: Greywacke is mostly found in Palaeozoic strata.
Q: What was the problem with the origin of Greywacke?
A: The problem with the origin of Greywacke was that gravel, sand, and mud should not be laid down together because river outflow drops heavier grains first.
Q: How is Greywacke formed?
A: Geologists think that Greywacke is formed by submarine avalanches or strong turbidity currents that churn sediment and cause mixed-sediment slurries to occur.
Q: Where are deposits of Greywacke found?
A: Deposits of Greywacke are found on the edges of the continental shelves, at the bottoms of oceanic trenches, and at the bases of mountain formational areas.
Q: How is the origin of Greywacke supported?
A: The turbidity current origin of Greywacke is supported by its occurrence in association with black shales of deep-sea origin.
