Andesite and Trondhjemite Types and Facts
Types
Icelandite
Not Available
Features
Generally rough to touch, High silica content, Is one of the oldest rock
Is one of the oldest rock, Typically speckled black and white.
Archaeological Significance
Monuments
Used
Not Yet Used
Famous Monuments
Middle of the Earth in Ecuador
Not Applicable
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Not Used
Not Used
Petroglyphs
Not Used
Not Used
Types of Andesite and Trondhjemite
Some rocks according to their use or texture are classified into different types. Know more about Andesite Texture and Trondhjemite Texture. Types of Andesite are Icelandite whereas the types of Trondhjemite are Not Available.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. Andesite and Trondhjemite were not used for creating 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. Andesite and Trondhjemite were not used for creating petroglyphs.