File:Bryozoan-encrusted fossil nautiloid (Kope Formation, Upper Ordovician; Maysville West roadcut, Mason County, Kentucky, USA) 3.jpg
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[edit]DescriptionBryozoan-encrusted fossil nautiloid (Kope Formation, Upper Ordovician; Maysville West roadcut, Mason County, Kentucky, USA) 3.jpg |
English: Bryozoan-encrusted fossil nautiloid from the Ordovician of Ohio, USA.
Nautiloids were relatively common components of Paleozoic oceans. They were basically a squid-in-a-shell. Most species had straight, slightly tapering shells, but some had loosely coiled or tightly coiled shells. The shells were mostly hollow, aragonitic, and had regularly-spaced internal walls. The entire group is represented in today's oceans by five living species of chambered nautilus, all of which have a coiled shell: Nautilus pompilius, Nautilus macromphalus, Nautilus stenomphalus, Nautilus belauensis, and Allonautilus scrobiculatus. Seen here is a partial internal mold of a nautiloid (= smooth, segmented area) - the original aragonite shell has dissolved away, leaving an impression of the inside surface of the shell. The nautiloid is encrusted by Spatiopora, a sheet bryozoan with short ridge-shaped, current-aligned monticules. The black spot near the center is a Sphenothallus "worm" holdfast. Classification: Animalia, Mollusca, Cephalopoda, Nautiloidea Stratigraphy: upper Taylor Mill Submember, McMicken Member, upper Kope Formation, uppermost Edenian Stage, lower Cincinnatian Series, Upper Ordovician Locality: ~5 to 6 meters below bench 4 on the eastern side of Jersey Ridge outcrop (= Harsha Bridge South outcrop; = Maysville West outcrop) - Rt. 62/Rt. 68 roadcut through Jersey Ridge, just south of the Harsha Bridge over the Ohio River, northern Mason County, northern Kentucky, USA (~vicinity of 38° 40’ 42.48" North latitude, 83° 47' 41.01" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/50730788433/ |
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@N05/50730788433. It was reviewed on 18 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
18 December 2020
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current | 15:22, 18 December 2020 | 2,821 × 1,683 (3.59 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50730788433/ with UploadWizard |
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Camera manufacturer | Canon |
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Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 15:24, 27 November 2020 |
Lens focal length | 11.614 mm |
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 18.0 (Macintosh) |
File change date and time | 19:29, 17 December 2020 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:24, 27 November 2020 |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
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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 | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 14:29, 17 December 2020 |
Unique ID of original document | 41C601675BFD3BD72B8E612EB267966F |
IIM version | 24,576 |