Fault Line

Definition

A fracture or break in the Earth's crust where two tectonic plates meet and can shift relative to one another, often resulting in earthquakes. Metaphorically, it refers to a fundamental tension or division in a system.

Example Usage

The San Andreas Fault Line is one of the most closely monitored geological features in the United States.

Origin

Geological term combining 'fault' (a geological fracture) with 'line' (the linear path of the break); 'fault' comes from Old French 'faute,' meaning failure or lack.

Fun Fact

The San Andreas Fault Line runs approximately 800 miles through California and is responsible for the state's frequent earthquakes; it moves about 1.6 inches per year.

Source: Definition backfill (hailey)

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