File:Cretaceous sedimentary rocks intruded by a Miocene granite laccolith (Cuernos del Paine, Torres del Paine National Park, Andes Mountains, Chile) 1 (39500150134).jpg
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(photo by Kathy Stott) This stunning mountainous scenery is in southern Chile's Torres del Paine National Park. The cliffs making up the prominent mountain peaks have a thick band of light-colored rocks with dark colored rocks above and below. The dark-colored rocks are structurally deformed (tilted & folded), Cretaceous-aged sedimentary rocks. They are mostly turbidites, which are deep seafloor deposits formed by underwater sediment slides (turbidity currents) cascading down the ancient continental slope. The light-colored rocks are granite, a felsic, intrusive igneous rock dominated by quartz and potassium feldspar. The granite is part of a widespread laccolith, which is a lens-shaped intrusion resembling the top of an umbrella or a mushroom or toadstool. This unit, the Torres del Paine Intrusion, dates to the Middle Miocene (~12.4 to 12.6 million years ago). The dark rocks above and below the granite intrusion have been contact metamorphosed. Some large, dark-colored xenolith blocks detached from the roof of the intrusion are just visible in the cliff faces here (click on the photo to zoom in and look around). Locality: Cuernos del Paine, Torres del Paine National Park (Blue Towers National Park), far-southern Chile, far-southern South America Geologic info. summarized from: Baumgartner et al. (2014) - The Torres del Paine intrusion as a model for a shallow magma chamber. European Geosciences Union General Assembly 2014 (<a href="http://adsabs.harvard.edu/abs/2014EGUGA..1615626B" rel="nofollow">adsabs.harvard.edu/abs/2014EGUGA..1615626B</a>) |
| Date | |
| Source | Cretaceous sedimentary rocks intruded by a Miocene granite laccolith (Cuernos del Paine, Torres del Paine National Park, Andes Mountains, Chile) 1 |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/39500150134 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 09:04, 1 December 2019 | | 1,477 × 1,285 (1.26 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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