Great Plains

east of

Rocky Mountains

Laurentia

In the United States, the [Laurentia] craton bedrock is covered with sedimentary rocks on the broad interior platform in the Midwest and Great Plains regions and is exposed only in northern Minnesota, Wisconsin, the New York Adirondacks, and the Upper Peninsula of Michigan.

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Fluorine (Wikipedia) Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light inert gases. It is highly toxic.

region of

tags

region

Wikidata

https://www.wikidata.org/wiki/Q12707

Wikimedia

https://commons.wikimedia.org/wiki/Category:Great_Plains

Wikipedia

https://en.wikipedia.org/wiki/Great_Plains

Wikivoyage

https://en.wikivoyage.org/wiki/Great_Plains