Jump to content

File:Tasmanite oil shale (kerogenite) (Quamby Mudstone, Lower Permian; at or near Quamby Brook, northern Tasmania) 1 (15015293186).jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (1,022 × 1,005 pixels, file size: 267 KB, MIME type: image/jpeg)

Summary

Description

Tasmanite (7.0 cm across at its widest) from the Quamby Mudstone (Lower Permian) of northern Tasmania.


Tasmanites is a long-ranging genus of marine microfossil. Tasmanites fossils are organic-walled and tiny (usually <0.1 to ~0.6 mm in size). Traditionally, their taxonomic affinities have been uncertain, but most researchers now agree that Tasmanites represent cysts of prasinophyte algae (Chlorophyta, Prasinophyceae).

Tasmanites is famously abundant in shales of the Lower Permian Quamby Mudstone in Tasmania. The Tasmanites-rich shales are informally called “white coals”. Tasmania’s white coals are actually a specific variety of oil shale (kerogen shale/kerogenite) called tasmanite. They are very rich petroleum source rocks that are not restricted to the Permian of Tasmania.

Published research indicates that Permian-aged tasmanite oil shales in Tasmania were deposited in a shallow marine setting dominated by sea ice and/or icebergs, representing a post-glacial sea level rise and flooding of a still-glaciated landscape.

Stratigraphy: lower Quamby Mudstone, Lower Parmeener Supergroup, probably Sakmarian Stage, lower Lower Permian.

Locality: unrecorded locality at or near the town of Quamby Brook, northern Tasmania.
Date
Source Tasmanite oil shale (kerogenite) (Quamby Mudstone, Lower Permian; at or near Quamby Brook, northern Tasmania) 1
Author James St. John

Licensing

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@N05/15015293186 (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

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

25 August 2014

image/jpeg

File history

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

Date/TimeThumbnailDimensionsUserComment
current01:30, 6 December 2019Thumbnail for version as of 01:30, 6 December 20191,022 × 1,005 (267 KB)Ser Amantio di NicolaoTransferred from Flickr via #flickr2commons

The following 3 pages use this file:

Global file usage