File:Hillsboro Sandstone (Lower Devonian; northwest of Sinking Spring, Ohio, USA) 1 (48950647881).jpg
Original file (4,000 × 3,000 pixels, file size: 7.86 MB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
_1_(48950647881).jpg&action=edit§ion=1){kind=link}
| Description |
Sandstone in the Devonian of Ohio. This is a weathered, rubbly exposure of a rare stratigraphic unit in Ohio - the Hillsboro Sandstone. This is the first and only time I've ever seen it. The yellowish-brown coloration is from iron oxide staining. Crack surfaces show that the iron oxide has penetrated portions of the interior. Unstained interiors are white, pure quartz sandstone. Clean, quartz-only sandstones are known as quartz arenites. Sand grains are angular to subangular, which is odd. I'd expect a mature sediment sample to consist of fairly rounded grains. It's possible that the angular shape of grains, as seen under a microscope, is due to pervasive quartz cement overgrowths. I can't discern rounded grain surfaces within the angular grains. A petrographic thin section would clarify this. Stratigraphy: Hillsboro Sandstone, Lower Devonian (at least one reference considers the Hillsboro to be correlative with the upper Middle Devonian to lower Upper Devonian Blocher Member, but most references consider the Hillsboro to be Lower Devonian, and correlative with the Sylvania Sandstone) Locality: northeastern corner of the Route 124-Woods Road intersection, northwest of the town of Sinking Spring, southeastern Highland County, southern Ohio, USA (39° 06' 12.36" North latitude, 83° 25' 48.29" West longitude) |
| Date | |
| Source | Hillsboro Sandstone (Lower Devonian; northwest of Sinking Spring, Ohio, USA) 1 |
| Author | James St. John |
Licensing[edit]
_1_(48950647881).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@N05/48950647881 (archive). It was reviewed on 4 November 2019 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 | 14:17, 4 November 2019 | | 4,000 × 3,000 (7.86 MB) | Ainz Ooal Gown (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_1_(48950647881).jpg&oldid=455324674){kind=link}