Wikimedia Commons

File:Dolostone breccia (Mackinac Breccia, Devonian; Interstate-75 exit near St. Ignace, Upper Peninsula of Michigan, USA) 2 (40975889854).jpg

Original file ‎(3,343 × 1,966 pixels, file size: 4.76 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary edit

Description

Breccia from the Devonian of Michigan, USA. (public display, Geology Department, Wittenberg University, Springfield, Ohio, USA)

This rock is a Devonian-aged dolostone breccia called the Mackinac Breccia. It is exposed in the vicinity of Castle Rock, Michigan. In that area, the unit is a dolostone block breccia - it's principally a jumble of broken blocks of dolostone derived from the St. Ignace Dolomite (upper Upper Silurian). The breccia represents deposition from many collapse events in paleocaverns of dissolved-out Salina Group evaporites (Upper Silurian). Post-Silurian collapse of dissolved-out Salina evaporites was a widespread phenomenon throughout the Michigan-Ohio region.

Stratigraphy: Mackinac Breccia, upper Lower Devonian to lower Middle Devonian

Locality: outcrop attributed to an Interstate-75 exit near St. Ignace, Upper Peninsula of Michigan, USA

For info. on the Mackinac Breccia, see:

Landes (1959) - The Mackinac Breccia. pp. 19-24 in Geology of Mackinac Island and Lower and Middle Devonian South of the Straits of Mackinac. Michigan Basin Geological Society.
Date
Source Dolostone breccia (Mackinac Breccia, Devonian; Interstate-75 exit near St. Ignace, Upper Peninsula of Michigan, USA) 2
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@N05/40975889854 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

File history

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

Date/TimeThumbnailDimensionsUserComment
current19:06, 7 December 2019Thumbnail for version as of 19:06, 7 December 20193,343 × 1,966 (4.76 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

You cannot overwrite this file.

There are no pages that use this file.

File usage on other wikis

The following other wikis 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.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Dolostone_breccia_(Mackinac_Breccia,_Devonian;_Interstate-75_exit_near_St._Ignace,_Upper_Peninsula_of_Michigan,_USA)_2_(40975889854).jpg&oldid=616208216"