Which sediment type is formed by ooids presenting concentric layers around a nucleus?

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Prepare for the IB Marine Science SL Exam. Use flashcards and multiple-choice questions with detailed explanations. Master marine ecosystems, ocean currents, and biological resources for success!

Multiple Choice

Which sediment type is formed by ooids presenting concentric layers around a nucleus?

Explanation:
Ooids are tiny spherical carbonate grains that grow by adding concentric layers of calcium carbonate around a central nucleus in warm, agitated shallow seawater. When sediment contains many of these ooid grains, the material is called oolite sands. Pelagic sediment is fine material that settles in deep water, nodules are irregular cemented masses, and sand simply refers to grain size. So, the sediment formed by ooids with concentric layering is oolite sands.

Ooids are tiny spherical carbonate grains that grow by adding concentric layers of calcium carbonate around a central nucleus in warm, agitated shallow seawater. When sediment contains many of these ooid grains, the material is called oolite sands. Pelagic sediment is fine material that settles in deep water, nodules are irregular cemented masses, and sand simply refers to grain size. So, the sediment formed by ooids with concentric layering is oolite sands.

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