File:Diorama of a Pennsylanian seafloor - Caninia rugose corals (31719551438).jpg
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[edit]DescriptionDiorama of a Pennsylanian seafloor - Caninia rugose corals (31719551438).jpg |
Seen here is a model-based reconstruction of life on an ancient seafloor during the Pennsylvanian Period - the "Age of Coal Swamps". This is a public exhibit at the Carnegie Museum of Natural History in Pittsburgh, Pennsylvania. From exhibit signage: Pennsylvania: a Tropical Paradise? Between 286 and 320 million years ago, the Pennsylvanian Period, North America straddled the equator. The Pittsburgh/Tri-State area was a land of tropical forests, beaches, and vast seas. The waters were warm and rich with life. The sea level repeatedly rose and fell, due to plate movement and collisions, periodically covering large parts of North America. The organisms shown above lived in these relatively shallow seas of less than 200 feet deep. The coastal areas teemed with micro-organisms. Distant relatives of today's sponges, corals, bryozoans, crinoids, and molluscs inhabited the bottom along with now exinct trilobites and ammonites, while primitive fishes swam above. Sediments eroded from the young Appalachian Mountains were washed into the shallow seas. There, marine limestones, sandstones, and shales formed, often preserving as fossils the remains of many dead organisms. Also buried were millions of micro-organisms, which through heat and pressure were transformed into the fossil fuels, oil and gas, that serve the world today. The organisms at front & center are Caninia rugose corals ("horn corals"). The reddish-colored structure in the background is a sponge. The coiled structure in the right background is a Straparollus gastropod (snail). |
Date | |
Source | Diorama of a Pennsylanian seafloor - Caninia rugose corals |
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@N05/31719551438 (archive). It was reviewed on 6 November 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 November 2018
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current | 04:44, 6 November 2018 | 3,000 × 4,000 (7.27 MB) | Lu Brito (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Date and time of data generation | 12:29, 12 July 2017 |
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Image title | |
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Height | 4,000 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 | 23:24, 27 October 2018 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:29, 12 July 2017 |
Meaning of each component |
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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 | 19:24, 27 October 2018 |
Unique ID of original document | 3D0C8CC95935DE4861AF760160C31614 |
IIM version | 32,767 |