Siltstone and Mudstone Types and Facts
Types
Not Available
Marl, Shale and Argillite
Features
Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, High silica content, Very fine grained rock
Available in Lots of Colors and Patterns, Smooth to touch, Very fine grained rock
Archaeological Significance
Monuments
Not Yet Used
Not Yet Used
Famous Monuments
Not Applicable
Not Applicable
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Not Used
Used
Petroglyphs
Not Used
Used
Types of Siltstone and Mudstone
Some rocks according to their use or texture are classified into different types. Know more about Siltstone Texture and Mudstone Texture. Types of Siltstone are Not Available whereas the types of Mudstone are Marl, Shale and Argillite.During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Siltstone was not used to create pictographs whereas Mudstone is used to create pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Siltstone was not used to create petroglyphs whereas Mudstone was used to create petroglyphs.