Here was a striking example of a young cumulonimubus (Cb) casting a shadow on a haze layer aloft. This formation over Gem, KS, also offered an atmospheric gem: iridescence, or prism-like refractive color separation, in the cirriform cloud streaks in the right-center of the picture, just above the near edge of the Cb. This striking scene highlighted an otherwise nondescript day of … [Read more...]
Black Canyon in the Light: Painted Wall
Responding about an inch per year to crustal uplift that raised the modern Rockies, western Colorado's Gunnison River has cut a deep, magnificent canyon here, 2,250 feet into a slab of very hard, 1.7-billion-year-old (Precambrian) gneiss and schist. The metamorphic rock's rigidity and erosion resistance keep the gorge unusually steep-walled. For scale, those are mature trees down there. … [Read more...]
Wet vs. Dry
The striking difference in appearance between a wet and dry surface is illustrated well here. A section of beach made of solid bedrock—in this case the colorful, cobble-infused, Precambrian Copper Harbor conglomerate—looks much brighter on its dry surface than the wet parts. Light gets reflected between the underside of the water's surface and the rock material, and gets scattered more … [Read more...]
Fall Colors from the Shadows
Rules have exceptions. I find them. This odd effect was made possible by a steep canyon slope, exposure for the bright aspens over the dark conifers, and deliberately violating a fundamental tenet of photographers that oppose midday shooting in the direction of the sun. In this case, the background slope across the southwest side (northeast slope) of the canyon was so steep that it held shorter … [Read more...]
Autumn at Curecanti
On a nearly perfect fall afternoon, a blend of stratocumulus, cumulus humilis and cumulus mediocris rode the southerly flow ahead of a mid/upper-level trough. Distant trees and foreground riparian grasses bore the mark of the changing seasons. Leaf-decorated waters of the Gunnison River's side channel reflected the sky in ripples pushed by a steady, gentle breeze carrying the unmistakable scent … [Read more...]
Pavement Pouring
As 2017 changed to 2018, Kilauea's Puu Oo vent still was in a three-decade process of repaving the landscape near and atop what once had been an acreage subdivision of Kalapana Gardens. This was part of the land-building exercise—part the final act, as it turns out, since the flushing of both the summit and Puu Oo craters down to Leilani Estates would occur just a few months later. Who knows … [Read more...]
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