black shale वाक्य

In the upper reaches of the river has cut a deep gorge, which has uncovered black shale in a few places.
One of the reasons indicating this period to be an oxygenation event is the increase in redox-sensitive Mo in black shales.
Above the red mudstone is green mudstone, followed by the Rhaetic bone bed at the base of a band of black shale.
Black Pipe Creek received its name from the fact Indians obtained black shale from the area in order to make their pipes.
These springs are " mineralized " by their contact with exposed black shale, from which iron sulfate is dissolved into the waters.

In another room, visitors can step through a doorway flanked by two columns decorated with mosaics of shell, pink limestone and black shale.
Black shale results from the presence of greater than one percent carbonaceous material and indicates a chlorite, biotite and illite greens ).
The Red Boiling Springs area is underlain by a type of black shale ( Chattanooga shale ), which is exposed in some stream beds.
The deposits from the ocean are structured such as the finest material travel the furthest and are deposited in the deep ocean as black shales.
The town encourages conservation development projects to protect and preserve existing black shale rock formations in the southwest edge of the town near Grapevine Lake.