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Chesapeake Bay and Delaware Bay are ________.

Who made the first clear statement of the law of superposition? When?

Ozone, another important component of the atmosphere is concentrated in the ________.

Types of climate-feedback mechanisms consist of ________.

Climate is a description of the ________.

Variations in the angle that Earth’s axis makes with the plane of it’s orbit is called ________.

When younger sedimentary strata overlie an eroded surface of older metamorphic or intrusive igneous rocks, this is called a(n) ________.

The________ isotopes in the hard skeletons of corals are an important paleothermometer.

Chesapeake Bay and Delaware Bay are ________.

The thickest and most extensive loess deposits on earth occur in ________.