File:Eau Claire Formation (Middle to Upper Cambrian; Warren County core, Ohio, USA) 1.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (4,000 × 2,336 pixels, file size: 4.96 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description
English: This is part of a continuously-cored section of Cambrian rocks from southwestern Ohio's deep subsurface. The Ohio Geological Survey drilled this core from 1987 to 1989 in northeastern Warren County, Ohio. It was intended to be a stratigraphic reference section from the Upper Ordovician to Precambrian basement rocks. Instead of encountering igneous or metamorphic rocks below the Cambrian sedimentary cover, the core unexpectedly penetrated a thick, late Precambrian-aged sedimentary succession, which has been interpreted as a rift-basin fill. The rift fill sedimentary rocks were a new stratigraphic formation now called the Middle Run Formation.

The rocks seen here are part of the Eau Claire Formation, a heterolithic unit consisting of mixed siliciclastics and carbonate rocks. The dark gray rocks seen above are shales. In eastern Ohio's subsurface, this shale-rich interval is known as the Conasauga Formation. Trilobite fossils have been retrieved from the Eau Claire Formation in the Warren County core - they allow biostratigraphic dating to the late Middle Cambrian-early Late Cambrian.

Stratigraphy: Eau Claire Formation, upper Middle Cambrian to lower Upper Cambrian

Locality: 2790 feet to 2800 feet interval (= feet below the surface well site), Ohio Division of Geological Survey core 2627, American Aggregates Corporation limestone quarry (now flooded), just northeast of the town of Lytle, northwestern Wayne Township, northeastern Warren County, southwestern Ohio, USA

Core-specific info. from:

Shrake (1991) - The Middle Run Formation: a subsurface stratigraphic unit in southwestern Ohio. Ohio Journal of Science 91: 49-55.
Date
Source Own work
Author James St. John

Licensing

[edit]
I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International 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.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

File history

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

Date/TimeThumbnailDimensionsUserComment
current20:05, 25 December 2018Thumbnail for version as of 20:05, 25 December 20184,000 × 2,336 (4.96 MB)Jsj1771 (talk | contribs)User created page with UploadWizard

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:Eau_Claire_Formation_(Middle_to_Upper_Cambrian;_Warren_County_core,_Ohio,_USA)_1.jpg&oldid=972744407"