File:Black shale over limestone (Blocher Member, New Albany Shale, Upper Devonian over North Vernon Limestone, Middle Devonian; drill core from Kavanaugh - 1-3 well, Daviess County, Indiana, USA) 2.jpg
Original file (1,280 × 800 pixels, file size: 814 KB, MIME type: image/jpeg)
Captions
Captions
Summary edit
_2.jpg&action=edit§ion=1){kind=link}
| Description |
English: Black shale over limestone 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; ~0.185 meters of section seen here)
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. The light-colored material at right is the uppermost North Vernon Limestone, plus a carbonate clast-rich basal lag of the New Albany Shale. Caption that accompanied this particular core display: The Blocher Member consists primarily of banded black shale that is variably dolomitic, pyritic, and organic-matter rich. [At right is a] basal lag with abundant crinoid fragments and carbonate clasts derived from the underlying North Vernon Limestone. Lag deposits of variable thickness (1 millimeter to 2 centimeters) occur higher up in the Blocher and indicate intermittent erosion within the shale succession caused by intermittent lower of sea level (thicker lags) and exceptionally strong but rare strosm (thinner lags). Stratigraphy: lowermost Blocher Member (uppermost Givetian Stage to lower Frasnian Stage, New Albany Shale, uppermost Middle Devonian to lower Upper Devonian) over uppermost North Vernon Limestone (Givetian Stage, upper Middle Devonian) Locality: drill core (~649.26 to 649.44 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@N05/52864040246/ |
| Author | James St. John |
Licensing edit
_2.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@N05/52864040246. It was reviewed on 2 May 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 | 16:54, 2 May 2023 | | 1,280 × 800 (814 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52864040246/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_2.jpg&oldid=825179768){kind=link}