File:Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 1 (33310529702).jpg
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[edit]DescriptionBrachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 1 (33310529702).jpg |
Exceedingly fossiliferous rocks of the Jeffersonville Limestone are well exposed at the famous Falls of the Ohio outcrop (Indiana side of the Ohio River at Louisville). These Middle Devonian rocks have abundant colonial and solitary corals (tabulates and rugosans), plus other typical Paleozoic shallow carbonate seafloor invertebrates (e.g., brachiopods, bryozoans, crinoids). The shells and skeletons in portions of the Jeffersonville Limestone have been silicified (replaced by quartz/silica - SiO2). The silicified fossils are more resistant to weathering than the limestone host rock. Upon weathering and erosion, the fossils stand out in relief, or are weathered completely free of matrix. Stratigraphy: Jeffersonville Limestone, lower Middle Devonian Locality: northern shore of the Ohio River, across from the city of Louisville, west of the Falls of the Ohio rapids, southern margin of Clark County, southern Indiana, USA (vicinity of 38° 16' 42.32" North, 85° 45' 57.79" West) |
Date | |
Source | Brachiopods in fossiliferous limestone (Jeffersonville Limestone, Middle Devonian; Falls of the Ohio, southern Indiana, USA) 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@N05/33310529702 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 December 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:59, 7 December 2019 | 3,589 × 2,993 (5.38 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
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F-number | f/4.9 |
ISO speed rating | 80 |
Date and time of data generation | 14:05, 2 August 2010 |
Lens focal length | 18.6 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 22:30, 15 March 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 14:05, 2 August 2010 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 9.65625 |
APEX aperture | 4.59375 |
APEX exposure bias | 0 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 18:30, 15 March 2017 |
Unique ID of original document | 7E7BA20B3AF6309CA7133B6632B27FCE |