Mudstones and shales are made of silt- and clay-sized particles that are too small to see. The only difference between mudstone and shale is that mudstones break into blocky pieces whereas shales break into thin chips with roughly parallel tops and bottoms. Both are made of ancient mud. read more
Mudstone and Shale Mudstones and shales are made of silt- and clay-sized particles that are too small to see. The only difference between mudstone and shale is that mudstones break into blocky pieces whereas shales break into thin chips with roughly parallel tops and bottoms. read more
Mudstone is the one in the middle of the group Shale is the most finest of the grain sizes and will appear and feel very slick and shiny almost like satin and get slippery. Also the formation of the rocks follows the same order. Siltstone can form into Mudstone Mudstone can be formed into Shale. read more