16 and 20 year old dating

16 and 20 year old dating-6016 and 20 year old dating-69

As snow continues to accumulate, the buried snow is compressed and forms firn, a grainy material with a texture similar to granulated sugar.

Air gaps remain, and some circulation of air continues.

Various gases are fractionated while bubbles are trapped where firn is converted to ice.

A core is collected by separating it from the surrounding material.

Deeper into the ice the layers thin and annual layers become indistinguishable.

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