Tag Archives: rock

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

Glacial Erratics

December 1, 2011 G Dan Mitchell 6 Comments

Glacial erratics rest on top of a low granite dome in the back-country of Yosemite National Park.

“Erratics” are boulders left behind in the wake of the passage of glaciers, and left behind when the glaciers disappeared. They are found all over the higher elevations of the Sierra Nevada and some of the most striking examples are found in surprising places – like along the top of this granite dome-like ridge in the Yosemite back-country along the Tuolumne River. After spending decades in these mountains I sometimes take these rocks for granted (and for “granite…” ;-), but every so often it hits me just how strange and wonderful it is to find these large boulders sitting in unlikely places.

I made this photograph in the late afternoon as the lowering sun began to cast longer shadows and as earlier clouds began to dissipate above the distant ridges. The Tuolumne River begins it steep descent into the lowlands between my position and the distant ridge covered with granite and trees.

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

Water and Granite, Tuolumne River

November 30, 2011 G Dan Mitchell Leave a comment

Swift water flows over granite along the bank of the Tuolumne River, Yosemite National Park.

In this section of the Tuolumne River – as in many other places throughout the Sierra Nevada – the river passes through a steep section and across granite slabs that span the full width of the river. As the water flows over the granite it forms constantly changing patterns of rock and whitewater that can only be predicted in general ways. The spot included in the photograph was right along the edge of the river, and you can see the transition between the diminished flow along the bottom edge and the faster and more abundant water in the main channel beyond.

Part of the fun of shooting this sort of subject – and shooting it is a pleasant way to spend an hour along the river – is in trying to find workable compositions in such a changeable subject. And making it even more “fun,” the shutter speed becomes an important decision as it determines just much the image is affected by motion blur and how much of the scene is stopped. Fortunately, digital cameras make this process just a bit more predictable and productive, since they allow the photographer to quickly see the result of composition and shutter speed choices and verify whether or not the educated guesses were correct, and to see just how the infinitely variable and unpredictable patterns of flowing water come together at the instant of exposure.

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

Evening Clouds, Tuolumne River Valley

November 25, 2011 G Dan Mitchell Leave a comment

Evening clouds from dissipating afternoon thunderstorms in early evening light above the Tuolumne River Valley, Yosemite National Park.

I recently posted a photograph of wildly colorful sunset clouds made a bit earlier on this same evening this past September as I was concluding a week-long photography backpack into the Yosemite back-country. By the time I had the photograph shown here, the most psychedelic of the sunset colors had begun to fade (though the reddish coloration on the granite is from that light) and I turned my attention to the thinning clouds.

Not much earlier, these clouds had been part of a massive line-up of huge thunderstorms over Yosemite high-country. I had escaped the rains since I was now in the relative lowlands around Glen Aulin, but it was clear that these had been some powerful localized storms. But as typically happens on many Sierra evenings, the giant storms soon dissipated and the clouds thinned to transparency as the day came to an end. By the time I made this photograph only a bit of direct sunlight was striking the tops of the highest remaining clouds.

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

Stones, Stained Granite

November 19, 2011 G Dan Mitchell Leave a comment

Granite stones rest on glaciated slab of stained granite near the Tuolumne River, Yosemite National Park.

Scared you, didn’t I? Thought I was going to miss posting a daily photograph, right? Yeah, both of you… ;-)

In any case, I may have mentioned previously that I’m a sucker for Sierra granite, especially the glaciated kind that is found almost everywhere you go in Yosemite National Park, from the Valley to areas surrounding the very highest peaks. (Some of the highest peaks escaped the glaciation themselves, but that’s a longer story for another time.) For me, some combination of glaciated granite slabs, a few “erratic” boulders (“erratics” being boulders moved from their source and left behind by retreating glaciers), some trees, and a bit of meadow grass, perhaps with a stream or lake nearby shouts “Sierra Nevada.”

This photograph does not include all of these Sierra ingredients but it does include the granite. I photographed this small bit of granite slab along a section of the Tuolumne River than runs through the back-country during a week-long backpack trip this past September. Something about the arrangement and color of the four larger stones against the water-stained underlying rock with its complex textures interested me. A lot of what is in the frame may not be visible in the small jpg version posted here, but there is a lot of detail in the frame: the texture or rock, crystal structures on some of the stones, several smaller pebbles, even a bit of dried pine needle.

G Dan Mitchell Photography

Tag Archives: rock

Glacial Erratics

Water and Granite, Tuolumne River

Stones, Stained Granite

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