Andesite
Classification
medium-extrusive igneous rock
color
dark gray to greenish gray
fabric
Avaneretic
mineral composition
Mesoporous plagioclase crystals and microporous ferromagnesian minerals
Chemical composition
Silica content between 63-57%
Formation environment
It is formed as a result of rapid cooling of lava on the surface.
structure
It may show a gradation in crystal size and a cohesive, solid structure.
Uses
1- Paving and backfilling
2- Geological studies of volcanic environments
Geographical presence
Arabian Shield rocks, Saudi Arabia
