slgwv's photos with the keyword: dike

The Painted Wall

The Painted Wall

slgwv
27 Aug 2015 5 5 553
Black Canyon of the Gunnison National Park, Colorado. The cliff here is roughly 2000 ft high (~610 m). The "paint" streaks are pegmatite dikes, traditionally interpreted as intruded into the dark host metamorphic rock from an outside reservoir, but which may instead have largely formed in place by partial melting ("anatexis.") Looking west and downstream from the south rim of the canyon.
Differential weathering

Differential weathering

slgwv
07 Sep 2013 1 2 162
Another example. The "ribs" standing out are finer-grained and thus more resistant than the rest of the granite.
Breached southeast dike

Breached southeast dike

slgwv
26 Apr 2011 3 5 304
Quail Creek Dam, near St. George, Utah, USA. The southeast dike of the dam collapsed in the wee hours on New Year's Day, 1989, after being undermined due to gypsum in the country rock dissolving out. There were no injuries but a considerable amount of property damage. The dike has been rebuilt with a much better foundation.
Some "fangs"

Some "fangs"

slgwv
19 Mar 2011 6 8 429
Probably volcanic necks. They are along Fang Ridge in the Reveille Range, Nye County, Nevada, USA, which probably defined an eruptive fissure.
IMG_3794_cleaned_adj

IMG_3794_cleaned_adj

slgwv
28 Jul 2013 135
IMG_3795_cleaned_adj

IMG_3795_cleaned_adj

slgwv
28 Jul 2013 117
IMG_8122_adj

IMG_8122_adj

slgwv
05 Jan 2012 120
IMG_8124_adj

IMG_8124_adj

slgwv
05 Jan 2012 97
IMG_8121_adj

IMG_8121_adj

slgwv
05 Jan 2012 109
IMG_6454_adj

IMG_6454_adj

slgwv
23 Jan 2012 89
IMG_6456_adj

IMG_6456_adj

slgwv
23 Jan 2012 101
IMG_6453_adj

IMG_6453_adj

slgwv
23 Jan 2012 92
25-dike_by_shiprock-4-92_ig_adj

25-dike_by_shiprock-4-92_ig_adj

slgwv
23 Dec 2011 1 2 180
32-@Donner_Pass_sxn_ig_adj

32-@Donner_Pass_sxn_ig_adj

slgwv
30 Jan 2012 146
29 items in total