File:Geoscience crowd sourcing (37633979015).jpg
Original file (3,600 × 2,828 pixels, file size: 3.67 MB, MIME type: image/jpeg)
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Summary[edit]
DescriptionGeoscience crowd sourcing (37633979015).jpg |
Geologists on a conference field trip are unraveling a sequence of avalanches in ocean bottom sediments at a mid-continent Precambrian outcrop outside Wawa Ontario, Canada. How were modern-day ocean bottom avalanches found? Much to the surprise of early industrialists, some of the first trans-Atlantic telegraph cables were sequentially snapped by giant deepwater sediment gravity flows. Layered sediments and rock formations resulting from such events falling off the edges of continental shelves around the world were named "turbidites" by scientists. Each layer is an avalanche. Which way is stratigraphic "Up" in these vertically-dipping metasedimentary rocks? Stratigraphic orientation is key. Tough to tell here but features seen elsewhere in the outcrop say that "Up" is to the left in this image (to the south when zoomed into the large roadside outcrop on flickr's map). The professor's hand is measuring widths of thin bedding which indicate reduced volumes of gravity-driven material with only fine silt and mud left in motion. Thicker sand-inclusive layers in the same outcrop are stratigraphically lower. from global-scale - en.wikipedia.org/wiki/Turbidite to scale of individual layer - en.wikipedia.org/wiki/Bouma_sequence |
Date | |
Source | geoscience crowd sourcing |
Author | Mike Beauregard from Nunavut, Canada |
Camera location | 48° 04′ 45.5″ N, 84° 44′ 52.18″ W | View this and other nearby images on: OpenStreetMap | 48.079306; -84.747827 |
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Licensing[edit]
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This image was originally posted to Flickr by subarcticmike at https://flickr.com/photos/31856336@N03/37633979015 (archive). It was reviewed on 3 February 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 February 2018
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:14, 3 February 2018 | 3,600 × 2,828 (3.67 MB) | Geo Swan (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON |
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Camera model | COOLPIX AW130 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/2.8 |
ISO speed rating | 125 |
Date and time of data generation | 11:51, 10 May 2017 |
Lens focal length | 4.3 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | COOLPIX AW130 V1.0 |
File change date and time | 11:51, 10 May 2017 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 11:51, 10 May 2017 |
Meaning of each component |
|
Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 24 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |