greywackes

the geologist identified several layers of greywackes in the outcrop.

ancient greywackes often indicate a high-energy depositional environment.

the core samples revealed a significant proportion of greywackes within the shale sequence.

erosion of the greywackes exposed the underlying bedrock.

the presence of well-rounded greywackes suggests a long transport history.

the study focused on the petrology and geochemistry of the greywackes.

the formation of greywackes is often associated with turbidity currents.

the researchers analyzed the grain size distribution in the greywackes.

the weathered greywackes exhibited a characteristic reddish-brown color.

the sequence included interbedded shales, sandstones, and greywackes.

the tectonic setting influenced the composition of the greywackes.