Describe the usefulness of varves to geologists who study glacial lake deposits

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Granite is a hard stone and lasts for a long time in both modern and ancient buildings. as proof of its durability, granite is often used in gravestones and memorials, intended to last for many years.

The first immigrants to settle in what is now the united states were the ancient ancestors of modern native americans. the precise routes of those first north american immigrants are disputed, but there is no uncertainty about the fact that every human being on the continent is either a recent immigrant or a descendant of earlier immigrants. since the first immigrants came here from asia more than thirteen thousand years ago, there have been four large and easily recognizable modern waves of immigrants into the united states.

Bcold,less-dense air falls