File:Fossil scallop in ironstone concretion (Nancy Member, Borden Formation, Lower Mississippian; Lewis County, Kentucky, USA) 2 (35592669622).jpg
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Summary
DescriptionFossil scallop in ironstone concretion (Nancy Member, Borden Formation, Lower Mississippian; Lewis County, Kentucky, USA) 2 (35592669622).jpg |
Fossiliferous ironstone concretion from the Mississippian of Kentucky, USA. This is a fossil pectinoid bivalve (scallop) in a concretion derived from a gray shale succession in Kentucky's Borden Formation. The Borden is an ancient delta deposit. The sediments were derived from erosion of mountains to the east, in what is now the Appalachians. The Appalachians of eastern America formed as a result of three separate mountain-building events during the Paleozoic: 1) Taconic Orogeny (Ordovician to Silurian); 2) Acadian Orogeny (Silurian to Devonian); and 3) Allegheny Orogeny (Carboniferous). Borden Formation sediments formed as the ancient Acadian Mountains eroded. Considerable amounts of sand, silt, and mud were washed down ancient rivers from the east and northeast and were deposited in deltaic environments - this was the Borden Delta. Classification: Animalia, Mollusca, Bivalvia, Pteriomorphia, Pterioida, Pectinoidea Stratigraphy: Nancy Member, Borden Formation, Lower Mississippian Locality: AA Highway roadcut, south-southwest of Buena Vista & east-southeast of Vanceburg, just northeast of the Rt. 9-Rt. 10 split (= stop 7b of Potter et al., 1991), northern Lewis County, northeastern Kentucky, USA (38° 34' 49.49" North latitude, 83° 16' 22.09" West longitude) Reference cited: Potter et al. (1991) - Geology of the Alexandria-Ashland Highway (Kentucky Highway 546), Maysville to Garrison. Joint Field Conference of the Geological Society of Kentucky and Ohio Geological Society, September 26-28, 1991. |
Date | |
Source | Fossil scallop in ironstone concretion (Nancy Member, Borden Formation, Lower Mississippian; Lewis County, Kentucky, USA) 2 |
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@N05/35592669622 (archive). It was reviewed on 8 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
8 October 2019
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26 May 2017
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9.681 millimetre
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:58, 8 October 2019 | 1,899 × 1,311 (2.35 MB) | Ser Amantio di Nicolao | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 14:57, 26 May 2017 |
Lens focal length | 9.681 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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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 | 14:37, 6 July 2017 |
Exif version | 2.21 |
Date and time of digitizing | 14:57, 26 May 2017 |
Meaning of each component |
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Shutter speed | 5.90625 |
APEX aperture | 6.65625 |
Exposure bias | −1 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.904761905 |
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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 | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6mm |
Date metadata was last modified | 10:37, 6 July 2017 |
Unique ID of original document | D69941C803C1EB1027678D0F8E6E58F6 |
IIM version | 2 |