What is the hardness of the lignite grade of coal?

The important phenomenon that happens during deposition is ____________

What is the type of lava which leads to the formation of laccolith?

What is the state of lava or magma?

Gneissose is indicative of advance degree of metamorphism.

The highest grade of coal is ________

The structure similar to maculose is ______

Low grade schist is formed under what conditions?