slgwv's photos with the keyword: weathering

Looking out the window

Looking out the window

slgwv
26 Nov 2018 124
Back toward the camera position in the enclosing photo. Painted Hills, north of Reno, Nevada.
Windows

Windows

slgwv
26 Nov 2018 3 6 360
Natural arches in volcanic rock (rhyolitic ash-flow tuff) in the Painted Hills, north of Reno, Nevada. This unit is notable for cavernous weathering! Insets show (left) a close-up of the lower window; and (right) a view back out this window looking toward this camera location.
Elephant Head Rock

Elephant Head Rock

slgwv
31 Oct 2016 3 3 446
View showing context in the surrounding rock.
Elephant Head Rock

Elephant Head Rock

slgwv
31 Oct 2016 1 366
View from the other side.
Elephant Head Rock

Elephant Head Rock

slgwv
31 Oct 2016 9 12 970
An extraordinary natural arch in heavily jointed, cavernous weathering granite. The insets show a couple of different views, one showing more of the surroundings, and the other a silhouette taken from the other side. Pershing County, Nevada. Anywhere else this would be a park with interpretive signs and entry fees; here it's just out in the middle of nowhere, accessible only by Jeep roads.
Differential weathering

Differential weathering

slgwv
07 Sep 2013 1 2 172
Another example. The "ribs" standing out are finer-grained and thus more resistant than the rest of the granite.
Talus slope

Talus slope

slgwv
03 Mar 2011 181
Above Virginia Lakes trail.
Talus slope

Talus slope

slgwv
19 Mar 2011 134
Above Blue Lake
Differential weathering

Differential weathering

slgwv
07 Apr 2011 6 7 438
Harder calcite (I think) veins weathering out of Aztec Sandstone. Valley of Fire State Park, Nevada, USA. The Aztec is correlative with the Navajo Sandstone of Utah and northern Arizona, but for historical reasons has a different name here. The calcite crystallized in cracks. You can tell this is a desert area, because the _calcite_ would weather first if the climate weren't so arid!
Liesegang weathering

Liesegang weathering

slgwv
23 Dec 2011 7 10 273
Precipitation from solution fronts, a natural analog of chromatography. The red mineral is hematite (ferric oxide), with some orange goethite (iron oxyhydroxide, better known as rust). This sort of weathering is very common in arid environments. Aztec Sandstone, southern Nevada, USA. The coin is there to show scale and is about 1 inch (2.5 cm) across.
35-exfoliation_olmsted_pt_ig_adj

35-exfoliation_olmsted_pt_ig_adj

slgwv
23 Jan 2012 142
33-exfoliation_olmsted_pt_ig_adj

33-exfoliation_olmsted_pt_ig_adj

slgwv
23 Jan 2012 123
Looking back toward Moat Lake

Looking back toward Moat Lake

slgwv
18 Mar 2011 119
Talus near Moat Lake

Talus near Moat Lake

slgwv
18 Mar 2011 151
23 items in total