The Designation of Sediment Grain Size, from Largest to Smallest

question 85

Multiple Choice

The designation of sediment grain size, from largest to smallest, is:

• A) clay, silt, sand, gravel.
• B) gravel, sand, silt, clay.
• C) gravel, silt, sand, clay.
• D) clay, sand, gravel, silt.
• E) silt, clay, gravel, sand.

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Definitions:

Mid-Ocean Ridge

An underwater mountain range formed by plate tectonics, where new oceanic crust is created.

Transform Fault

A strike-slip fault that accommodates the horizontal movement of one tectonic plate past another.

Mid-Atlantic Ridge

An underwater ridge located in the Atlantic Ocean, forming a divergent tectonic plate boundary that separates the Eurasian and North American plates in the north and the African and South American plates in the south.

Seafloor Spreading

A geologic process in which tectonic plates move apart from each other, allowing magma to rise and solidify as new oceanic crust.