Look up and you'll see the terrestrial vault
The stalactites in this picture hang from subvertical Carboniferous limestone strata, deformed during the Variscan Orogeny. The reddish colours are inherited from the Fe-rich nodular limestones (Griotte) from which the calcium carbonate that constitutea the stalactites has been dissolved. Upon contact with the air of the cave, the drops loose their CO2, causing precipitation of the now-saturated calcium carbonate.
The photo was taken in the beautiful Valporquero Cave, in the province of León, northern Spain
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Reuse
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) (opens in a new window)Credit: Manuel de Paz Álvarez (distributed via imaggeo.egu.eu)
Properties
Type
Image
Format
JPG
Size
10.1 MB
Width
4724 px
Height
3140 px
Aspect
1181:785
Brand
Nikon
Model
D3200
Exposure
18 mm f/3.5 1/20 s ISO 1600
Taken
19 April 2015
Coordinates
42.9086, -5.5638
Tint
Dark brown
Submitted
28 February 2017
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