The view of the Atigun River Gorge looking south into the core of the Brooks Range, seen from the front of a helicopter flying over the north ridge. The serrated ridge across the valley (~ 5000’/ 1500m) is composed up of the Fortress Mountain formation, a mix of marine and non-marine sediments, including, siltstones, conglomerates, and carbon rich strata with carbonized plant debris (logs/ coal) of Cretaceous age. Marine fossils (molluscs) occur in the lighter colored sediments. The influence of water in the drainage channels on vegetation is clear from the darker green stripes leading to the Atigun River. The higher peaks (all un-named) in the back are around 7000’ / 2100 m, some of which have remnant glaciers clinging to their slopes. At this latitude (68.5˚ N) the sun doesn’t set during the summer- this was taken around 9 pm, with the sun still fairly high in the WNW.

Loading comments...

Loading contexts...

Make:	SONY
Model:	ILCE-7M3
Exposure:	0.002 sec (1/500)
Aperture:	f/13.0
ISO Speed:	400
Focal Length:	70 mm
Lens:	FE 24-70mm F2.8 GM