| 11. | This has a number of weirdly shaped rock pinnacles, the remains of ancient volcanic plugs.
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| 12. | The hill is the fifth in a series of volcanic plugs called the Nine Sisters.
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| 13. | Trindade is a mountainous, desiccated volcanic island with numerous phonolitic lava domes and steep-sided volcanic plugs.
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| 14. | Mount PMhaturoa ( 520 m ) is a distinctive volcanic plug that dominates the Atiamuri landscape.
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| 15. | They are geologically noteworthy for being volcanic plugs.
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| 16. | "This feature is an eroded volcanic plug-the most distinctive navigational landmark on the entire North Beach.
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| 17. | Another building on a volcanic plug is the 14th century Trosky Castle in the Czech Republic.
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| 18. | The volcanic plug rises about above the surroundings.
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| 19. | "' Castle Rock "'is a volcanic plug in the middle of Edinburgh upon which Edinburgh Castle sits.
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| 20. | Erosion has revealed a volcanic plug on the western peak, giving the hill its distinct breast-like shape.
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