These currents are on the oceans surface and in its depths, flowing both locally and globally.
Sediments are typically laid down in layers, or strata, usually in a body of water. On the seafloor, sediments are thinnest near spreading centers (young seafloor) and thicker away from the ridge, where the seafloor is older and has more time to accumulate. Sediments are also much thickest near continents.
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The p<span>leistocene</span>is the most recent epoch of repeated glaciation on the earth.
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