Speaking as a complete non-expert, I think that what we’re looking at here is a boundary between the low point of a small playa-like section of dried earth and a slightly higher area with black pebbles. The pebbles appear to be volcanic material from a nearby eruption that took place hundreds or thousands of years ago. (The particular feature may have erupted as recently as 800 years, though it has also possibly been longer.)
Continue reading A Boundary
I have walked past this place scores of times — it is along one of my regular walks. I walk almost daily, often along one of a group of familiar routes. It had been weeks since I last did this one, so it was time again to visit it. As I walked along a creek and past some commercial buildings I “saw” something that I have certainly seen before, but not really noticed — a great wall of ivy roots stretched across concrete.
Continue reading Ivy Roots
A few years ago three of us explored a long section of narrow canyon in Utah, looking for photographs in this rich landscape. We started in a broad valley where a stream flowed between low hills, but soon the walls rose and steepened and the valley narrowed, and we found ourselves following a creek. The canyon was alternately wide and then narrow and constricted.
Continue reading Autumn Trees, Canyon Wall
This is probably the classic notion of what a desert looks like — fields of wind-formed sand dunes stretching into the distance. In truth, such dunes typically cover only a very small fraction of the desert landscape. That’s certainly true in Death Valley National Park, where large, impressive dunes are only found in a handful of locations. We visited one of them on the final morning of our late February trip.
Continue reading Aeolian Bedforms