Gold: Forming Deposits (American Museum of Natural History) - Explanation of how lode deposits are formed in various environments.
Gold (Geology.com) - Brief description about gold formation.
Where Does All the Gold Come From? (phys.org) - Learn where gold came from and why it is able to be found today.
What is Silver (geology.com) - Learn how silver is formed.
How Does Silver Form (Australian Mines Atlas) - Brief explanation of silver formation.
Copper (University of Waterloo) - This article provides great background knowledge about copper, including where it comes from and where it can be found.
How Copper Deposits are Formed (Australian Mines Atlas) - Brief description of copper formation
Iron Ore (geology.com) - Great summation on the origins of iron ore.
The Formation of Iron (Australian Mines Atlas) - Succinctly shares how iron oxide is developed over time.
