Joints in granite (Cadillac Mountain Granite, Silurian-Devonian boundary times, ~419 Ma; Thunder Hole, Mt. Desert Island, Maine, USA) 2 : 無料・フリー素材/写真
Joints in granite (Cadillac Mountain Granite, Silurian-Devonian boundary times, ~419 Ma; Thunder Hole, Mt. Desert Island, Maine, USA) 2 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Joints are fractures in rocks along which no differential displacement has occurred. This distinguishes them from faults, along which displacement has taken place.The jointed rocks seen here are part of the Cadillac Mountain Granite, a Middle Paleozoic intrusion in Acadia National Park, Maine. Published dates of the Cadillac Mountain Granite include ~419 Ma (= Silurian-Devonian boundary times) and ~365 Ma (= Late Devonian).Locality: Thunder Hole, eastern rocky coastline of Mount Desert Island, Acadia National Park, southern shoreline of Maine, USA |
| 撮影日 | 2006-09-12 13:14:28 |
| 撮影者 | James St. John |
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