Tonstein
id:
tonstein-238-4145800
title:
Tonstein
text:
Tonstein is a hard, compact sedimentary rock that is composed mainly of kaolinite or, less commonly, other clay minerals such as montmorillonite and illite. The clays often are cemented by iron oxide minerals, carbonaceous matter, or chlorite. Tonsteins form from volcanic ash deposited in swamps.
Tonsteins occur as distinctive, thin, and laterally extensive layers in coal seams throughout the world. They are often used as key beds to correlate the strata in which they are found. The regional per
brand slug:
wiki
category slug:
encyclopedia
description:
Type of sedimentary rock
original url:
https://en.wikipedia.org/wiki/Tonstein
date created:
date modified:
2022-11-04T21:54:20Z
main entity:
{"identifier":"Q9394820","url":"https://www.wikidata.org/entity/Q9394820"}
image:
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fields total:
13
integrity:
15