Xenolith in granite (Acadia National Park, Maine, USA) 4 : 無料・フリー素材/写真
Xenolith in granite (Acadia National Park, Maine, USA) 4 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Xenoliths are pieces of rock that have fallen from the walls or roof of a cooling magma chamber, or have become entrained in rising masses of magma ("xeno" means "foreign" and "lith" means "rock"). Xenoliths can occur in intrusive igneous rocks or extrusive igneous rocks (= volcanic lava).Geologic unit: Cadillac Mountain Granite, Silurian-Devonian boundary times, 419 Ma [a 365 Ma date has also been published]Locality: Acadia National Park, Mt. Desert Island, Maine, USA |
| 撮影日 | 2006-09-12 11:13:30 |
| 撮影者 | James St. John |
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