File:Cryogenian-Ediacaran boundary (Nuccaleena Formation over Elatina Formation, Neoproterozoic; Enorama Creek section, Flinders Ranges, South Australia) 10.jpg
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Summary
editDescriptionCryogenian-Ediacaran boundary (Nuccaleena Formation over Elatina Formation, Neoproterozoic; Enorama Creek section, Flinders Ranges, South Australia) 10.jpg |
English: This is a "GSSP", a global stratotype section and point. Stratigraphers have been establishing these for important boundaries on the geologic time scale for many years now. This particular GSSP is in the Flinders Ranges of South Australia - it defines the boundary between the last two systems of the Precambrian, the Cryogenian (below) and the Ediacaran (above).
The reddish rocks at left are sandstones in the basal Nuccaleena Formation, which overlie dark reddish glacial tillites of the Elatina Formation (just out of frame here). The tillites were deposited during the Marinoan Glaciation, which was one of two or three Snowball Earth glaciations in the Neoproterozoic - all or almost all of Earth was covered in ice. Each Snowball Earth glaciation was followed by a super-greenhouse climate, which resulted in the deposition of "cap carbonates" (= buff-colored dolostones at right). Stratigraphy: Ediacaran-Cryogenian boundary in the basal Nuccaleena Formation, middle-upper Neoproterozoic boundary Locality: outcrop along Enorama Creek, Brachina Gorge Geologic Trail, Flinders Ranges National Park, South Australia (31° 19.892’ South latitude, 138° 38.001’ East longitude) See info. at: en.wikipedia.org/wiki/Cap_carbonate and en.wikipedia.org/wiki/Marinoan_glaciation and en.wikipedia.org/wiki/Snowball_Earth |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/50847206552/ |
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@N05/50847206552. It was reviewed on 18 January 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
18 January 2021
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current | 03:07, 18 January 2021 | 3,008 × 2,000 (4.22 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50847206552/ with UploadWizard |
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/250 sec (0.004) |
F-number | f/8 |
ISO speed rating | 200 |
Date and time of data generation | 21:52, 19 August 2006 |
Lens focal length | 44 mm |
Width | 3,008 px |
Height | 2,000 px |
Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 19:33, 17 January 2021 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 21:52, 19 August 2006 |
Meaning of each component |
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APEX shutter speed | 7.965784 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 4.2 APEX (f/4.29) |
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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 | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 66 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 1004a0cc |
Lens used | 18.0-70.0 mm f/3.5-4.5 |
Date metadata was last modified | 14:33, 17 January 2021 |
Unique ID of original document | D0D57480CCF9968BD2DD93F9174443E9 |