What are these from? Some kind of airplane?

6590-debris.jpg Hmmm, debris of some kind in an otherwise rather pristine place Thumbnails I encounter some debris further up the Quail Mountains canyon Hmmm, debris of some kind in an otherwise rather pristine place Thumbnails I encounter some debris further up the Quail Mountains canyon Hmmm, debris of some kind in an otherwise rather pristine place Thumbnails I encounter some debris further up the Quail Mountains canyon Hmmm, debris of some kind in an otherwise rather pristine place Thumbnails I encounter some debris further up the Quail Mountains canyon Hmmm, debris of some kind in an otherwise rather pristine place Thumbnails I encounter some debris further up the Quail Mountains canyon

EXIF Metadata

Make
NIKON
Model
COOLPIX L30
DateTimeOriginal
2015:02:20 12:25:30
ApertureFNumber
f/8.0