Bathonian
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In the geologic timescale, the Bathonian is the age of the Middle Jurassic epoch of the Jurassic period of the Mesozoic era of the Phanerozoic eon that is comprehended between 167 million 700 thousand and 164 million 700 thousand years ago, approximatedly. The Bathonian age succeeds the Bajocian age and precedes the Callovian age, all in the same epoch.
The stage takes its name from Bath, a spa town built on Jurassic limestone, which is, of course, what gives it its healing powers. The city itself is largely built of Bath Stone, a bright, white oölitic limestone that is quarried nearby.
Fauna
| Jurassic period | |||||
|---|---|---|---|---|---|
| Lower/Early Jurassic | Middle Jurassic | Upper/Late Jurassic | |||
| Hettangian | Sinemurian | Aalenian | Bajocian | Oxfordian | Kimmeridgian |
| Pliensbachian | Toarcian | Bathonian | Callovian | Tithonian | |
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