#mypubliclandsroadtrip 2016: Teacher Approved, Malm Gulch : 無料・フリー素材/写真
#mypubliclandsroadtrip 2016: Teacher Approved, Malm Gulch / mypubliclands
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Explore Malm Gulch -- a petrified forest just south of Challis, Idaho -- with #mypubliclandsroadtrip.Fifty million years ago, this area of Idaho was much different. The climate was cool and wet, just like you see now on the Pacific coast. Large sequoia or redwood forests covered the mountains, and ferns blanketed the forest floor. All of that changed when geological activity in the area increased. Violent volcanic eruptions showered the area with volcanic ash, changing the environment and turning trees into a vast petrified forest. All that remains of these forests today are a few tree stumps—some almost 6 feet in diameter—in the Malm Gulch area.As you trek along the short Malm Gulch hiking trail, try to imagine this dry area covered with giant trees and lush ferns. |
| 撮影日 | 1980-01-01 00:00:08 |
| 撮影者 | mypubliclands |
| タグ | |
| 撮影地 | |
| カメラ | Canon EOS 10D , Canon |
| 露出 | 0.008 sec (1/125) |
| 開放F値 | f/6.7 |
| 焦点距離 | 48 mm |