Hettangian

（重定向自Hettangian Stage）

Ammonit Alsatites proaries
:Privatsammlung Reiter

The Hettangian is the earliest age or lowest stage of the Jurassic period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the Rhaetian (part of the Triassic period) and is followed by the Sinemurian.

单词	Hettangian Stage
释义	Hettangian Stage 英语百科 Hettangian （重定向自Hettangian Stage） The Hettangian is the earliest age or lowest stage of the Jurassic period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199.3 ± 0.3 Ma (million years ago). The Hettangian follows the Rhaetian (part of the Triassic period) and is followed by the Sinemurian.
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