Mudstone is the finest
grained clastic sedimentary rock.
It mainly contains clay sized particles
- too small to see without a microscope.
as well as quartz,
oxides are sometimes present.
It is most often dark
grey or black
It can form very thick deposits and it can
It forms in some different environments such as seas,
oceans and lakes.
It is in many ways similar to shale
colour, range, and mineral content are similar, however it is not
laminated and does not break in the way that shale