English: Formations in Jewel Cave National Monument, South Dakota
תאריך יצירה
תאריך בלתי־ידוע
Unknown date
14 בדצמבר 2005 (תאריך העלאה מקורי)
מקור
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2005-12-14 21:56 Paul Stokstad 260×180× (28254 bytes) Taken from the Jewel Cave National Monument homepage (http://www.nps.gov/jeca/index.htm). Cropped. Photographer unknown.