91.0k views
2 votes
How did Washington’s black, basalt cliffs form?

User Teamcrisis
by
7.5k points

2 Answers

5 votes

Answer:

Lava thats cooled

Step-by-step explanation:

User Xystum
by
7.8k points
4 votes

erosion of lava flows and floods after the release of water from an ice dam that formed the glacier lake Missoula.
User Makmour
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7.7k points
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