The oldest rocks in North America are in the Canadian Shield around Hudson Bay. There are rocks in Greenland over 4 billion years old. The lowest level of the Grand Canyon is about 2 billion years old.
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The smallest region in the US is the New England region, which consists of the states of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It covers a total area of about 71,991 square miles.
The smallest region is Gibraltar, a British Overseas Territory located on the southern tip of the Iberian Peninsula. It covers an area of only 2.6 square miles.
Rhode Island is the smallest state in the southwestern region of the United States.
The smallest infrared radiation wavelength is approximately 0.7 micrometers (700 nanometers). This corresponds to the near-infrared region of the electromagnetic spectrum.
The smallest cells of the root tip are typically located in the meristematic region, which is the actively growing area of the root where new cells are continuously produced. These cells are important for root growth and development.
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