Tag Archives: geology

Photographs: Nature, Photographs: Northern California, Photographs: Sierra Nevada, Photographs: Yosemite

Glacial Erratics, Near Olmsted Point

October 11, 2012 G Dan Mitchell Leave a comment

Glacial erratic boulders rest on a tree-topped granite slab at sunset near Olmsted Point, Yosemite National Park

Among the various landscapes of the high Sierra, this sort of scene most clearly says “Yosemite” to me: the glaciated granite slabs, mostly solid but broken but exfoliating and broken by cracks; the scattered glacial erratic boulders left behind by retreating ice; and the sparse trees somehow managing to not only survive but seemingly prosper while growing on almost solid rock. Although you don’t see precisely these things in the better known Valley, once you get up into the high country of the park you’ll see these features almost everywhere, and especially in the zone from, say, 8000′ of elevation or so and on up.

This photograph was made close to Olmsted Point. While Olmsted is probably better known for its “backside” view of Half Dome and its huge views up toward Tenaya Lake and on to the Sierra crest at Mount Conness, the immediate surroundings are full of this typical Sierra terrain that I described above. Most of the terrain above, below, and around the Point shows evidence of this glacial action, and by taking a few steps away from the parking lot in almost any direction (but do avoid cliffs!) you can find enough examples of this landscape to keep yourself occupied for a long time.

Text, photographs, and other media are © Copyright G Dan Mitchell (or others when indicated) and are not in the public domain and may not be used on websites, blogs, or in other media without advance permission from G Dan Mitchell.

Photographs: Nature, Photographs: Utah

Ledge With Fallen Rocks

September 10, 2012 G Dan Mitchell Leave a comment

Red cliffs and rocks on a ledge at Park Avenue, Arches National Park.

I made this photograph fairly early in the morning at the Park Avenue area of Arches National Park. While morning might was hitting the walls behind my camera position, the walls in front of me were still in fairly deep shade. However, as the sun rose, its light began to come over the tops of these tall sandstone walls and spill down into the canyon. As the morning wore on, the light/shadow line began to move back closer to this wall, first illuminating the ledge and the fallen rocks in holds and then beginning to highlight edges of some of the cracks in the wall itself.

The Park Avenue area seems like one of the most accessible areas of this park being only a short distance inside the park boundaries and being very close to the roadway. The area is essentially a canyon between two nearly parallel walls of sandstone, often topped with remarkable towers and other features as the canyon descends toward where it opens up into sage brush country below. At this particular hour of this particular morning, as wonderful as that scene was, the light shooting down the canyon was only so-so, so I looked around, put on a long lens, and photographed smaller vignettes of the landscape such as this one.

Photographs: Desert, Photographs: Mono Lake Basin, Photographs: Nature, Photographs: Northern California, Photographs: Owens Valley

Sand Tufa, Mono Lake

July 19, 2012 G Dan Mitchell Leave a comment

Early morning light on details of sand tufa formations, Mono County.

I have wanted to photograph this subject for some time. The sand tufas are not found in the same location as the better-known “tufa towers” that are so often photographed, and they are smaller and somewhat subtler (if that is the right word) subjects. If you weren’t aware of what you were looking for, it would be very easy to pass right by them and barely notice their presence at all. They also appear to be very fragile, so great care should be taken if you ever happen to come across them. Walk around, not over or through them, and minimize your impact on them to the greatest extent possible. If you come across examples, it is probably best to not blast a lot of specific information to the world. I don’t know all of the details of their formation, but judging by their locations and by the recent history of lower lake levels, I suspect that they may have been underwater before the historically recent extraction of water from the eastern Sierra by Los Angeles.

If you are thinking of looking for an interesting and easy to shoot photographic subject, don’t bother with the sand tufa. You’ll probably have much better luck and more fun shooting the impressive and better known and larger “tower” features at other areas. These small structures do not tower above anything. Some are only inches tall, and the largest are just a few feet tall. Their natural color is a muted and, let’s be honest, boring gray color. Their location does not particularly allow them to be paired with more impressive and distant large-scale landscape features such as the expanse of the lake’s surface or the surrounding mountains and hills, with the possible exception of certain kinds of cloud formations. When I went there I had some pre-conceived ideas about I might photograph them, perhaps including the Sierra’s eastern escarpment in the images, but these ideas did not pan out. However, by shooting in the first few minutes of light and working with a long focal length to crop tightly I found some interesting fluted patterns to work with.

Photographs: Nature, Photographs: The Southwest, Photographs: Utah

Murphy Point, Sunset

May 25, 2012 G Dan Mitchell Leave a comment

Sunset light on Murphy Point, photographed from Green River Overlook, Canyonlands National Park.

We spent the better part of a day scouting around the “Island in the Sky” section of Canyonlands National Park, partly with the goal of figuring out where to be for golden hour light. In the end, the very first place we had really considered ended up being the place we came back to – the Green River Overlook. While quite a few landscape photographs can be somewhat spontaneous and a matter of quickly taking advantage of ephemeral conditions, the decision to photograph at the Green River Overlook was quite the opposite. Not only had I decided that I wanted to shoot at this location, but I had even worked out the composition of the shot that I wanted.

With that in mind, we came back here almost an hour before actual sunset, confident that the photograph I had in mind would be waiting for me. And it was! That photograph was shot looking roughly west or a bit south of west and across the canyons dropping into the Green River. But I also had quite a bit of time to look around at other possible subjects as the light slowly transformed. The steep upper cliffs of (what I believe to be) Murphy Point stood to my south and the sunset light began to intensely color their red rocks during the final few minute of sunlight. So I took a moment away from the shot I had come for, pivoted the tripod this direction, and made a few exposures. The geology seen in this area is amazing. Layer upon layer build from the bottoms of the river canyon, through the side canyons and onto the lower plateaus. Then shattered rock stacks up against the tall upper sandstone cliffs that are topped by the relative flatlands of the “Island in the Sky” area. Here the low angle side-light from the setting sun reveals a lot of the more subtle details of this landscape.

G Dan Mitchell Photography

Tag Archives: geology

Glacial Erratics, Near Olmsted Point

Ledge With Fallen Rocks

Sand Tufa, Mono Lake

Murphy Point, Sunset

Photographer and visual opportunist. Daily photos since 2005, plus articles, reviews, news, and ideas.