File:Fossil brachiopods in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA) 5.jpg
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Summary
[edit]DescriptionFossil brachiopods in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA) 5.jpg |
English: Brachiopods in limestone in the Devonian of Ohio, USA. (bedding plane view)
The Columbus Limestone is a significant carbonate unit in the Devonian of central and northern Ohio. It's actually part of a much more widespread sheet of Devonian carbonates that extends from New York State to America's Midwest. The Columbus Limestone represents deposition in a subtropical, shallow-water, carbonate platform environment. The rocks are principally micritic limestones, fossiliferous wackestones, and fossiliferous packstones. Some chert nodules are present in the unit. Fossils are typical Paleozoic shallow marine invertebrates - favositid corals, rugose corals, stromatoporoids, brachiopods, crinoids, blastoids, bryozoans, trilobites, bivalves, gastropods, cephalopods, rostroconchs, and tentaculites. Microfossils include conodonts and charophyte oogonia. Other fossils in the Columbus Limestone include vertebrates (fish), land plants (rare), and trace fossils. Some fossil horizons in the Columbus Limestone are partially silicified. Seen here are fossil brachiopod shells in matrix. Brachiopods are sessile, benthic, filter-feeding, marine invertebrates. They first appear in Cambrian rocks and were abundant in Earth's oceans throughout the Paleozoic. They were also common in Mesozoic oceans, but are scarce in modern oceanic biotas. Brachiopods have two shells, called valves, that are usually calcareous (made of calcite - CaCO3 - calcium carbonate). Each shell of a brachiopod is bilaterally symmetrical, unlike each shell of a bivalve (clam). Classification: Animalia, Brachiopoda, Articulata (a.k.a. Rhynchonelliformea) Stratigraphy: Columbus Limestone, Eifelian Stage, lower Middle Devonian Locality: trailside block (out of place), Quarry Trails Park, Marblecliff Quarry (Marble Cliff Quarry), western side of Columbus, Franklin County, central Ohio, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/51788426753/ |
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@N05/51788426753. It was reviewed on 3 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 January 2022
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current | 17:32, 3 January 2022 | 4,000 × 3,000 (7.73 MB) | Ɱ (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51788426753/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/320 sec (0.003125) |
F-number | f/3.2 |
ISO speed rating | 80 |
Date and time of data generation | 09:23, 17 December 2021 |
Lens focal length | 8.295 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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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 | 01:18, 29 December 2021 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 09:23, 17 December 2021 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 8.3125 |
APEX aperture | 3.34375 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
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 | 6.2-18.6 mm |
Date metadata was last modified | 20:18, 28 December 2021 |
Unique ID of original document | 70CE3EDA8C72809E369CA298CB1A31DF |
IIM version | 53,248 |