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From Ice to Fire 21 - Dolerite Sill


From Ice to Fire 21 - Dolerite Sill
Photo Information
Copyright: Neels Gunter (corjan3) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 430 W: 49 N: 964] (4707)
Genre: Landscapes
Medium: Color
Date Taken: 2014-08-30
Categories: Mountain
Exposure: f/10.0, 1/400 seconds
Photo Version: Original Version
Date Submitted: 2014-10-04 11:57
Viewed: 2013
Points: 20
[Note Guidelines] Photographer's Note
The 21st in the series under the title FROM ICE TO FIRE - A 200 MILLION YEAR JOURNEY BETWEEN TWO DESERTS. To follow the whole story, one would have to start with Image 1.

It still is the year 183 million before present and the supercontinent Gondwana is beginning to crack apart. Magma wells up from below along fissures and some of it solidifies on its upward journey to form near-vertical dykes of dolerite like the one shown in No 20 of the series. At the same time some magma intrudes laterally inbetween the layers of sedimentary strata to form sills of dolerite varying in thickness from a few to hundreds of metres.

The thick sill seen here forming the top of the mountains intruded several kilometres below the surface and is now exposed at the present-day surface after many millions of years of erosion. Being relatively more resistant to weathering than the sedimentary strata, the dolerite sills, where exposed at the surface, form the higher topographic features.

The snow that occurred here a few weeks ago has nothing to do with the title of the series as the current climate is very different from what prevailed then. And while the topography is very much influenced by the underlying geology, it also is very different from, and much lower than, the land surface of the early Jurassic Period.

ramthakur, Hotelcalifornia, anel, Jamesp, PeterZ, lousat, peter_stoeckl has marked this note useful
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To ramthakur: Snowcorjan3 1 10-04 19:41
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Critiques [Translate]

Ciao Neels, fantastic mountain landscape, excellent clarity, wonderful natural colors and splendid light, very well done, my friend, have a good week end, ciao Silvio

  • Great 
  • tuslaw Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2754 W: 282 N: 4931] (19883)
  • [2014-10-04 18:21]

Hello Neels,
Beautiful landscape image which reminds me somewhat of the terrain surrounding the Grand Canyon area in our western states. Nicely composed shot showing the exposed layers of rock on the right as well as the eroded mountains in the BG. The snow is a real bonus to an already attractive scene.
Ron

Neels, believe me, but I never imagined it snows in SA! What a pleasant surprise!!
Seen in relation with earth's history, this beautiful landscape turns much more interesting for me.
Regards.
Ram

Hello Neels - Beautiful Landscape with precise and useful details of its origin. I haven't visited Eastern Cape yet, hope will go one day. Good details with well DOF. Thanks for sharing. Regards - Srikumar

  • Great 
  • anel Gold Star Critiquer/Gold Note Writer [C: 3053 W: 3 N: 8715] (40574)
  • [2014-10-05 1:51]

Hello Neels,
Beautiful panoramic view on these SA mountains, even covered with snow!
Interesting for me to see the flat tops of these rocks, looks so much different from ours.
Kind regards
Anne

  • Great 
  • Jamesp Gold Star Critiquer/Gold Note Writer [C: 1369 W: 9 N: 6334] (18906)
  • [2014-10-05 4:23]

Hi Neels

A lovely shot - strange for me to see snow in SA (though the first time I arrived the area round Johannesburg was white with frost).

Nice use of the frame and contrasting forms and colours.

Best wishes

James

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2014-10-05 5:39]

Hello Neels,
Very beautiful landscape with a nice combination of warm and cold colours. Excellent DOF and composition.
Regards,
Peter

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2014-10-05 14:03]

Hi Neels,interesting note another time,and a beautiful pic as usual,the snow is not the best element for the geological analysis,but give a good touch of spectacle to the composition..eehhe....very well done as usual! Have a nice week and thanks,Luciano

  • Great 
  • periko Gold Star Critiquer/Gold Note Writer [C: 70 W: 2 N: 145] (1487)
  • [2014-10-06 18:50]

Hi Neels
Beautiful landscape. I didn't know that there is snow in South Africa. Interesting.

Regards

great to see snow in SA, TFS Ori

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