File:Bryozoans in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Route 16 roadcut near Trinway, Ohio, USA) 2 (39880154383).jpg
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Summary
editDescriptionBryozoans in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Route 16 roadcut near Trinway, Ohio, USA) 2 (39880154383).jpg |
Fossiliferous limestone from the Pennsylvanian of Ohio, USA. (field of view ~3.7 centimeters across) The Lower Mercer Limestone is a Middle Pennsylvanian-aged, laterally persistent, marine fossiliferous limestone unit in the Pottsville Group of eastern Ohio, USA. It is richly fossiliferous, principally dominated by brachiopods and crinoid stems. In the rock seen here, the brownish-colored areas at upper left, near-center, and lower right are cross-sections through bryozoans, also known as "moss animals". Bryozoans are colonial lophophorates, most of which make a calcareous skeleton. Many bryozoan skeletons have complex shapes that cannot be fully appreciated from the fossil record. Bryozoans are abundant fossils, especially in Paleozoic and Mesozoic limestones, but their skeletons usually get busted up during the storm events resulting in their final burial. These bryozoans probably belong to the trepostome Tabulipora ohioensis. Classification: Animalia, Lophophorata, Bryozoa Stratigraphy: Lower Mercer Limestone, Pottsville Group, lower Atokan Stage, lower Middle Pennsylvanian Locality: roadcut along the northern side Rt. 16, southern margin of Irish Ridge, west of the Rt. 16-Rt. 60 intersection, northwest of the town of Trinway, northwestern Muskingum County, eastern Ohio, USA (40° 09’ 12.95” North latitude, 82° 02’ 43.27” West longitude) |
Date | |
Source | Bryozoans in fossiliferous limestone (Lower Mercer Limestone, Middle Pennsylvanian; Route 16 roadcut near Trinway, Ohio, 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@N05/39880154383 (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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:06, 8 October 2019 | 2,118 × 1,421 (2.12 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 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 17:35, 22 January 2019 |
Lens focal length | 11.614 mm |
Image title | |
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 13.0 (Macintosh) |
File change date and time | 21:16, 22 January 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:35, 22 January 2019 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.66666666666667 |
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 |
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 | 16:16, 22 January 2019 |
Unique ID of original document | AACCADD45832CFBF7CBB3AB91FDDD999 |
IIM version | 1 |