File:Amphicyrtoceras pettiti (fossil nautiloid) (Lockport Dolomite, Middle Silurian; Rockford Stone Company Quarry, Rockford, Ohio, USA) 1.jpg
Original file (1,687 × 1,339 pixels, file size: 1.48 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionAmphicyrtoceras pettiti (fossil nautiloid) (Lockport Dolomite, Middle Silurian; Rockford Stone Company Quarry, Rockford, Ohio, USA) 1.jpg |
English: Amphicyrtoceras pettiti (Billings, 1866) - fossil nautiloid in dolostone from the Silurian of Ohio, USA. (public display, Geology Department, Wittenberg University, Springfield, Ohio, USA)
Nautiloids are squid-like creatures that construct long and slightly tapering or coiled, aragonitic, hollow shells with regularly-spaced internal walls. In the fossil record, the original aragonite shell has usually dissolved away, leaving an internal mold (an impression of the shell's interior). Nautiloids were relatively common components of Paleozoic oceans. Most species had straight, slightly tapering shells, but some had loosely coiled or tightly coiled shells. 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. In the above photo, the lines at the top of the fossil are sutures, marking the intersection of internal walls (septa) and the external shell. The lower portion of the fossil lacks sutures - that’s the living chamber where the squid animal was located. Classification: Animalia, Mollusca, Cephalopoda, Nautiloidea, Oncocerida (= Oncoceratida), Acleistoceratidae Stratigraphy: Lockport Dolomite, Niagaran Series, Middle Silurian Locality: Rockford Stone Company Quarry (now abandoned & flooded), 1.5 miles northwest of the town of Rockford, northern Mercer County, northwestern Ohio, USA. (40° 42' 29.10" North latitude, 84° 40' 01.28" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/40408660840/ |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/40408660840. It was reviewed on 20 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
20 October 2020
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:29, 20 October 2020 | 1,687 × 1,339 (1.48 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/40408660840/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/14 |
ISO speed rating | 80 |
Date and time of data generation | 08:44, 24 March 2018 |
Lens focal length | 18.6 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
|
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 | 13:32, 19 May 2018 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 08:44, 24 March 2018 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 7.625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
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 | 09:32, 19 May 2018 |
Unique ID of original document | C102773D4158B260126AEDC63A62F847 |
IIM version | 32,767 |