Which is the rock present in the majority on the surface of earth?

The grade of coal with very low calorific value is ________

The Gondwana rock system is famous for which mineral?</p>

Type of false bedding where the individual layers exist in well-defined sets of parallel layers is ________

The bedding involving crater shaped depressions is ________

The important phenomenon that happens during deposition is ____________

Which of the following rocks is not a metamorphic rock?</p>

Give an example for rudaceous rock.