Hettangian

专有名词
中文释义

英文释义

专有名词
  1. The earliest age of the Jurassic period, from 199.3–201.3Ma
  2. The corresponding lowest stage of the Jurassic system, marked by the lowest strata in which the neoammonite genus Psiloceras appears.

词汇关系

相关词
Schlotheimia angulata Alsatites liasicus Psiloceras planorbis

词源

From French Hettange, now Hettange-Grande, a commune in northeastern France, (German Hettingen, Luxembourgish (Lorraine Franconian) Hetténgen).
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