English Explanatory Dictionary

tonstein

English dictionary entry

Meanings

noun
  1. 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. Any indurated argillaceous rock that stands out within coal measures as a distinctive marker horizon.

Pronunciation

tŭn′stīn′ /ˈtʌnˌstaɪ̯n/ /ˈtʌnˌstʌɪ̯n/ /ˈtʌnˌstʌi̯n/ /ˈtʌnˌstəi̯n/ /ˈtɐnˌstɑe̯n/ /ˈtɐnˌstaɪ̯n/ /ˈʈənˌsʈajn/

Word forms

tonstein tonsteins

Etymology

Borrowed from German Tonstein, from Ton (“clay”) + Stein (“stone”).

Related words

bentonite claystone fireclay seat earth shale tuff
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