Concretion: An artifact that is made of several smaller artifacts cemented together by broken shells, rust and sand.
Dredge: A machine used to dig out material under water.
Ingot: A solid piece of metal that was formed for convenient handling and transport. All of the ingots from El Nuevo Constante were circular. Most were disk-shaped, with one side that curved out and the other side that was flat. These were called planchas, and they appear to have been made by pouring molten metal into shallow holes in the ground. A few of the ingots were shaped like cupcakes.
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