File:Black shales (Clegg Creek Member, New Albany Shale, Upper Devonian; drill core from Kavanaugh - 1-3 well, Daviess County, Indiana, USA) 1.jpg
Original file (1,171 × 312 pixels, file size: 299 KB, MIME type: image/jpeg)
Captions
Captions
Summary edit
_1.jpg&action=edit§ion=1){kind=link}
| Description |
English: Black shales from the Devonian of Indiana, USA. (on display in New Albany, Indiana during the 24-25 September 2004 annual field conference of the Great Lakes Section, Society of Economic Paleontologist and Mineralogists; up-section is to the left; from the red dot to the right margin is ~0.35 meters of section)
This is a core through part of the New Albany Shale, a Devonian-aged formation in Kentucky, Indiana, Illinois, and eastern Missouri. The unit is dominated by dark-colored marine mudshales of Late Devonian age. These black shales were deposited in a moderately deep, anoxic seafloor environment. This was a widespread lithofacies during the Late Devonian's Global Anoxia Event. The New Albany Shale is equivalent to the Ohio Shale, the Antrim Shale, and the Chattanooga Shale in surrounding states. The New Albany Shale's member terminology varies from region to region. In southwestern Indiana, where this core was drilled, the New Albany consists of (from the base upward): Blocher Member, Selmier Member, Morgan Trail Member, Camp Run Member, and Clegg Creek Member. Caption that accompanied this particular core display: . . . typical Clegg Creek black shale. It has a massive appearance with faint lamination and scattered sub-millimeter to millimeter-thick silty laminae (quartzose and pyritic). The Clegg Creek Shale contains the highest concentrations of total organic carbon in the New Albany Shale succession. The biostratigraphic marker Foerstia (Protosalvinia) was found approximately 7 to 8 meters above the base of the Clegg Creek. Foersita (Protosalvinia) occurrence coincides with highly pyrite-enriched black shales, suggestive of very slow deposition, and probably marks a maximum flooding interval in the upper portion of the Clegg Creek Member. Stratigraphy: Clegg Creek Member, upper New Albany Shale, Upper Devonian Locality: drill core (~610.29 to 610.64 meters depth), Kavanaugh # 1-3 well, south-southwest of the town of Montgomery, Barr Township, Daviess County, southwestern Indiana, USA (38° 38' 20" North latitude, 87° 03' 43" West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52850150475/ |
| Author | James St. John |
Licensing edit
_1.jpg&action=edit§ion=2){kind=link}
- 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@N05/52850150475. It was reviewed on 27 April 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:08, 27 April 2023 | | 1,171 × 312 (299 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52850150475/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_1.jpg&oldid=825179784){kind=link}