How Long Does It Take for a Large Magma Body

question 83

Multiple Choice

How long does it take for a large magma body at great depth to cool and completely crystallize?

• A)a few days
• B)a few months
• C)several years
• D)several tens to a hundreds of thousands of years

---

Definitions:

Low Hydrogen

Low hydrogen refers to specific types of welding electrodes that produce welds with lower hydrogen content, reducing the risk of hydrogen embrittlement and cracks in welded metals.

Arc Welding Electrodes

Consumable or non-consumable pieces of metal in arc welding that conduct a current to join metallic parts.

Tempered Steel

Steel that has been heat-treated to increase its strength and durability through a process of heating and cooling.

Dump Truck Frame

The structural backbone of a dump truck, designed to support the cab, engine, and dumping mechanism, while withstanding heavy loads.