Some part of life – perhaps the most important part – must be left to the spontaneous action of individual impulse, for where all is system there will be mental and spiritual death.
Clastic rock (Wikipedia)Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks, and smaller grains of rock broken off other rocks by physical weathering. Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment deposits.