Oolitic Limestone Forms as the Result Of

question 52

Multiple Choice

Oolitic limestone forms as the result of:

• A) the precipitation of silica in concentric coats around particles of calcium carbonate.
• B) calcium carbonate precipitated as pearls by oysters around invading sand particles.
• C) organic secretions of silica around calcium carbonate particles.
• D) the precipitation of calcium carbonate in concentric coats around grains of sand.

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Definitions:

Difference Threshold

The minimum difference in stimulation that a person can detect 50% of the time, also known as the "just noticeable difference."

Auditory Convergence

A phenomenon in which sounds from different sources merge into a single perceived auditory event.

Refractory Threshold

The level of stimulus intensity or the period following a nerve impulse during which a nerve or muscle is unresponsive to further stimulation.

Fovea

A small depression in the retina of the eye where visual acuity is highest, due to the high density of cones (color-receiving cells).