Wikimedia Commons

File:Volcanic tuff (bentonite) (ash-fall tuff) (Split Fish Layer, Fossil Butte Member, Green River Formation, Lower Eocene; Promised Lands Quarry, Hams Fork Plateau, southwestern Wyoming, USA) 1 (14968718273).jpg

Original file ‎(3,516 × 1,428 pixels, file size: 1.18 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary edit

Description

Volcanic tuff (bentonite) (ash-fall tuff) from the Eocene of Wyoming, USA (6.7 cm across along the base).

This is a volcanic tuff, also known as a bentonite. It formed during an ash fall event following an explosive volcanic eruption. The tuff is probably a magnesian rhyolite or dacite. Tuff beds such as this occur as interbeds in the famous fossil fish-bearing beds of the Green River Formation in southwestern Wyoming. The source volcano for this particular volcanic tuff is undetermined, but published research has shown that it likely derived from the Absaroka Volcanic Field (= modern-day Yellowstone National Park area and adjacent Absaroka Mountains of northwestern Wyoming) or the Challis Volcanic Field of central Idaho.

Stratigraphy: volcanic tuff interbed in succession of fossiliferous lacustrine marlstones, Split Fish Layer, Fossil Butte Member, Green River Formation, Lower Eocene, ~49 to 51 Ma

Locality: wall of Promised Lands Quarry (SE1/4 sec. 22, T22N, R17W), Hams Fork Plateau, ~13.5 to 14 km northwest of the town of Kemmerer, southwestern Wyoming, USA (41° 51' 53.85" North latitude, 110° 40' 28.86" West longitude)

See info. at:

<a href="https://en.wikipedia.org/wiki/Green_River_Formation" rel="noreferrer nofollow">en.wikipedia.org/wiki/Green_River_Formation</a>
Date
Source Volcanic tuff (bentonite) (ash-fall tuff) (Split Fish Layer, Fossil Butte Member, Green River Formation, Lower Eocene; Promised Lands Quarry, Hams Fork Plateau, southwestern Wyoming, USA) 1
Author James St. John

Licensing edit

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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@N05/14968718273 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 December 2019

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current01:59, 6 December 2019Thumbnail for version as of 01:59, 6 December 20193,516 × 1,428 (1.18 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

You cannot overwrite this file.

The following page uses 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.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Volcanic_tuff_(bentonite)_(ash-fall_tuff)_(Split_Fish_Layer,_Fossil_Butte_Member,_Green_River_Formation,_Lower_Eocene;_Promised_Lands_Quarry,_Hams_Fork_Plateau,_southwestern_Wyoming,_USA)_1_(14968718273).jpg&oldid=650583334"