What is an example of a soft rock?

Soft rocks basically referring to sandstones, mudstones, shale, greywacke or sedimentary rocks that are generally softer than igneous and metamorphic rocks with classified medium to fine grained size.

What are the types of soft rocks?

For practical reasons it comes out that soft rocks comprise mainly sedimentary and low degree metamorphic rocks although some igneous lavas have to be considered. Usually sound magmatic rocks belong to the hard to medium type. Highly porous lava flows and pumice may show low strength, light weight and high water absorption.

What is a soft rock song?

Soft rock was often derived from folk rock, using acoustic instruments and putting more emphasis on melody and harmonies. Major artists included Carole King , Cat Stevens , The Hollies , James Taylor [4] and Bread. [5] [6] Soft rock songs generally tend to focus on themes like love, everyday life and relationships.

How do soft rocks compact?

Most appear to compact by solution processes rather than by mechanical compaction. For practical reasons it comes out that soft rocks comprise mainly sedimentary and low degree metamorphic rocks although some igneous lavas have to be considered. Usually sound magmatic rocks belong to the hard to medium type.

What is the difference between hard and soft weathered rocks?

In that criterion hard weathered rock can only be excavated with the use of explosives while so called soft weathered rocks are those too hard to be penetrated by the usual SPT tool but with properties of a very hard soil that may be excavated by usual scrapers not needing to be excavated by explosives.