Bathonian

Bathonian
168.2 ± 1.2 – 165.3 ± 1.1 Ma
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionFAD of the Ammonite Gonolkites convergen
Lower boundary GSSPRavin du Bès, Bas-Auran, Alpes de Haute, France
43°57′38″N 6°18′55″E / 43.9606°N 6.3153°E / 43.9606; 6.3153
Lower GSSP ratifiedJuly 2008[2]
Upper boundary definitionFAD of the Ammonite genus Kepplerites
Upper boundary GSSP candidate section(s)

In the geologic timescale the Bathonian is an age and stage of the Middle Jurassic. It lasted from approximately 168.2 ±1.2 Ma to around 165.3 ±1.1 Ma (million years ago). The Bathonian Age succeeds the Bajocian Age and precedes the Callovian Age.[3]

  1. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.
  2. ^ Fernández-López, Sixto Rafael; Pavia, Giulio; Erba, Elisabetta; Guiomar, Myette; Maria Helena Henriques; Lanza, Roberto; Mangold, Charles; Morton, Nicol; Olivero, Davide; Daniele Tiraboschi (2009). "The Global Boundary Stratotype Section and Point (GSSP) for base of the Bathonian Stage (Middle Jurassic), Ravin du Bès Section, SE France" (PDF). Episodes. 32 (4): 222–248. doi:10.18814/epiiugs/2009/v32i4/001.
  3. ^ For a detailed geologic timescale, see Gradstein et al. (2004)