Transition Floodplain-Terraces : 無料・フリー素材/写真
Transition Floodplain-Terraces / SoilScience.info
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Photo 4 of 5. Transition between active Schuylkill River floodplain and ancient terraces. Human transported materials (0-20 cm) over stratified anthracite coal/quartz alluvium (30-55 cm) indicate land use changes since the early 1900s. The lower buried soil has a thick Ap horizon (60-90 cm) over Bw horizons indicating past agriculture on the floodplain before industrial coal mining deposited waste over top of this field. |
| 撮影日 | 2019-05-20 10:58:44 |
| 撮影者 | SoilScience.info , Raleigh |
| 撮影地 | |
| カメラ | Canon EOS Rebel T6 , Canon |
| 露出 | 0.025 sec (1/40) |
| 開放F値 | f/4.0 |
| 焦点距離 | 18 mm |