tonstein

Fetched 2026-10-26 (cache).

Synonyms: torstein, einstein, ostein, holstein, bornstein, bronstein, hornstein, ornstein, torsten, arnstein, fontein, lobstein

Antonyms: torstein, einstein, ostein, holstein, bornstein, bronstein, hornstein, ornstein, torsten, arnstein, fontein, lobstein

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|geology}} A hard, compact, kaolinite-rich claystone formed by the diagenetic alteration of volcanic ash, usually occurring as thin, laterally persistent layers interbedded with coal seams.
2. {{lb|en|petrology}} Any indurated argillaceous rock that stands out within coal measures as a distinctive marker horizon.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.