tonstein

名词 n.
中文释义
英 /ˈtʌnˌstaɪ̯n/    美 /ˈtʌnˌstaɪ̯n/|/ˈtɐnˌstɑe̯n/

英文释义

名词 n.
  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. countable,uncountable
    — Tonsteins, which are altered volcanic ash, mark instantaneous events over large areas and thus are excellent time markers for basin analysis.
  2. Any indurated argillaceous rock that stands out within coal measures as a distinctive marker horizon. countable,uncountable
    — In Figure 13, all data points of the tonstein samples fall within the CHARAC range.

词形变化

tonsteins plural

词汇关系

相关词
bentonite claystone fireclay seat earth shale tuff

词源

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