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Great photo of Giant's Causeway in yesterday's Earth Sci. Pic. of the Day. This is a top view of the "causeway", stretching back toward land. The causeway is made of columnar basalt, which is a feature seen when thick lava flows cool and crack into roughly hexagonal columns.
Photographer: John Franzel Summary Author: John Franzel Giant's Causeway is a huge deposit of columnar basalt found in County Antrim near the tip of Northern Ireland. The predominantly hexagonal-shape...
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