File:Cretaceous sedimentary rocks intruded by a Miocene granite laccolith.jpg
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[edit]DescriptionCretaceous sedimentary rocks intruded by a Miocene granite laccolith.jpg |
English: Cretaceous sedimentary rocks intruded by a Miocene granite laccolith (Cuernos del Paine, Torres del Paine National Park, Andes Mountains, Chile)
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 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:
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Date | |
Source | https://www.flickr.com/photos/jsjgeology/40178861392 |
Author | James St. John |
Licensing
[edit]This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40178861392 (archive). It was reviewed on 1 March 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 March 2019
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current | 00:52, 1 March 2019 | 2,560 × 1,920 (3.04 MB) | RockingGeo (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | Panasonic |
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Camera model | DMC-TZ3 |
Exposure time | 1/160 sec (0.00625) |
F-number | f/4.7 |
ISO speed rating | 100 |
Date and time of data generation | 11:46, 29 October 2008 |
Lens focal length | 16.9 mm |
Width | 2,560 px |
Height | 1,920 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 16:56, 11 February 2018 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 11:46, 29 October 2008 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 7.321928 |
APEX aperture | 4.465322 |
APEX exposure bias | 0 |
Maximum land aperture | 3.44 APEX (f/3.29) |
Metering mode | Pattern |
Light source | Fine weather |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 124 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Date metadata was last modified | 11:56, 11 February 2018 |
Unique ID of original document | 775A071EA9A7C9048DDEA6EF3E8EC0A6 |
Structured data
Items portrayed in this file
depicts
some value
29 October 2008
0.00625 second
4.7
16.9 millimetre
100
image/jpeg
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3,190,460 byte
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- Granite in Chile
- Laccoliths in Chile
- Sedimentary rocks in Chile
- Cuernos del Paine
- Cretaceous geology of South America
- Miocene geology of South America
- Granite intrusions in Chile
- Miocene igneous intrusions in Chile
- Cretaceous sedimentary rocks in Chile
- Turbidites
- Deep marine deposits in Chile
- Cretaceous marine deposits in Chile
- Marine deposits
- Geology of Cuernos del Paine