Columbia River Basalt Group map shows main regions of basalt exposure in Washington, Oregon, Idaho and Nevada, USA. (usgs.gov)

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Based upon the features of its spectrum, Beta Librae has a stellar classification of B8 V, making it a B-type main-sequence star.

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Clearwater Embayment
Columbia Gorge
Columbia Trans-Arc Lowland
Malheur Gorge
Oregon Plateau
Weiser Embayment

website

https://www.usgs.gov/media/images/columbia-river-basalt-group-map-shows-main-regions-basalt-exposu