Why igneous rocks are called primary rocks?

More Questions

• Why are igneous rocks called primary rocks?
• What is inbound call and outbound call?
• Why is python called python?
• What is the group of lions called?
• Why sardar vallabhbhai patel is called iron man of india?
• Why solid carbon dioxide is called dry ice?
• Why is a group of crows called murders?
• What is the difference between primary and secondary data?
• What is the white of an egg called?
• What are the primary air pollutants?