William (Bill) Armstrong's photos with the keyword: dunes

active dunes-GSH

active dunes-GSH

William (Bill) Armstrong
08 Feb 2025 12
Another view of the active dunes in the Great Sand Hills, showing the effects from the near-constant wind.
GSH dunes & ripples

GSH dunes & ripples

William (Bill) Armstrong
07 Feb 2025 2 20
A view of the active dues in the Great Sand Hills, which are almost constantly being sculpted by the wind.
life on the edge-GSH

life on the edge-GSH

William (Bill) Armstrong
07 Feb 2025 1 17
For vegetation living along the edges of the active dunes of the Great Sand Hills, life is precarious.
what is next?

what is next?

William (Bill) Armstrong
01 Jun 2022 3 67
While processing this image I wondered if the tree in the lower left might be the next to be inundated by the drifting sand. The dunes move roughly to the east, driven by the near constant westerly winds.
transition to the dunes

transition to the dunes

William (Bill) Armstrong
30 May 2022 2 65
A transition zone in the Great Sand Hills, where the vegetation and the dunes meet. This image was taken in 2007.
a transition line

a transition line

William (Bill) Armstrong
29 May 2022 2 74
An image showing the transition area where the vegetation ends and the dunes begin , at the Great Sand Hills of Saskatchewan.
a transition line 2

a transition line 2

William (Bill) Armstrong
29 May 2022 3 69
The same image of the transition line in the Great Sand Hills, cropped as a vertical.
GSH ripples 2013

GSH ripples 2013

William (Bill) Armstrong
06 Dec 2019 85
The rippling lines that were there when I took this may have been entirely different the following day. Don’t use this image on websites, blogs or other media without explicit permission. Copyright William Armstrong. 2019
GSH hardy vegetation

GSH hardy vegetation

William (Bill) Armstrong
06 Dec 2019 1 86
The plants that grow on the sand hills have to be tough, and face the possibility of being drowned by shifting sands. Don’t use this image on websites, blogs or other media without explicit permission. Copyright William Armstrong. 2019
GSH looking west

GSH looking west

William (Bill) Armstrong
11 Jun 2018 78
Don’t use this image on websites, blogs or other media without explicit permission. Copyright William Armstrong. 2018