File:Bleeding unconformities in the Blocher Member of the New Albany Shale (Upper Devonian; Interstate 65 entrance ramp roadcut, Bullitt County, Kentucky, USA).jpg
Original file (1,280 × 960 pixels, file size: 1.23 MB, MIME type: image/jpeg)
Captions
Summary edit
DescriptionBleeding unconformities in the Blocher Member of the New Albany Shale (Upper Devonian; Interstate 65 entrance ramp roadcut, Bullitt County, Kentucky, USA).jpg |
English: Bleeding unconformities in weathered black shales in the Devonian of Kentucky, USA.
These are weathered black shales in the lower 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 basal unit in the New Albany is the Blocher Member - it consists of dolomitic black shales (dolosiltites, actually). The fissile nature of Blocher rocks is due to post-depositional compaction. Blocher beds are rich in organic carbon and have been homogenized by bioturbation. The reddish- / orangish-brown areas in the photo are bleeding unconformities - surfaces of erosion and/or non-deposition of sediments. These are paraconformities, with horizontal sedimentary rocks above and below the contacts, which have no obvious paleotopography. Oxidative weathering of pyrite (FeS2 - iron sulfide; "fool's gold") in the rocks has produced iron oxide minerals such as reddish-brown hematite and yellowish-brown limonite. The iron oxides have stained the underlying rocks via descending meteoric waters (rain and runoff). Stratigraphy: Blocher Member, lower New Albany Shale, Frasnian Stage, lower Upper Devonian Locality: roadcut along the western side of the south-bound entrance ramp to Interstate 65 at the Route 245-Interstate 65 interchange, north-northeast of Belmont & south of Sherpherdsville, south-central Bullitt County, north-central Kentucky, USA (37° 55' 24.45" North latitude, 85° 41' 18.33" West longitude) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/52869351484/ |
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@N05/52869351484. It was reviewed on 9 May 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
9 May 2023
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 02:02, 9 May 2023 | 1,280 × 960 (1.23 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52869351484/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
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.
Image title |
|
---|---|
Camera manufacturer | OLYMPUS OPTICAL CO.,LTD |
Camera model | C900Z,D400Z |
Exposure time | 1/233 sec (0.0042918454935622) |
F-number | f/2.9 |
ISO speed rating | 100 |
Date and time of data generation | 19:55, 24 September 2004 |
Lens focal length | 6 mm |
Width | 1,280 px |
Height | 960 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 20.0 (Macintosh) |
File change date and time | 03:29, 4 May 2023 |
Y and C positioning | Co-sited |
Exif version | 2.1 |
Date and time of digitizing | 19:55, 24 September 2004 |
Meaning of each component |
|
Image compression mode | 2 |
APEX shutter speed | 7.84549 |
APEX aperture | 3.072106 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Date metadata was last modified | 23:29, 3 May 2023 |
Unique ID of original document | C6677F1F968D1C21E49689E2C7ECF1E4 |