Why Have No Rocks Older Than 4

question 5

Essay

Why have no rocks older than 4.03 Ga been found in the Earth's crust?

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Definitions:

Gallbladder

A small organ beneath the liver that stores bile, which is used in the digestion of fats.

Microanatomists

Scientists who specialize in the study of anatomy at the microscopic level, including cells and tissues.

Epithelial Tissue

A type of tissue that lines the outer surfaces of organs and blood vessels, as well as the internal surfaces of cavities in many internal organs.

Abdominal Muscles

A group of muscles in the abdomen that include the rectus abdominis, external oblique, internal oblique, and transversus abdominis.