Lutetian
Geologic period
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The Lutetian is, in the geologic timescale, a stage or age in the Eocene. It spans the time between 47.8 and 41.2 Ma. The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it is sometimes referred... Wikipedia
Epoch: Eocene
Occurred: 47.8 million years ago - 41.2 million years ago
Lower boundary definition: FAD of the calcareous nannofossil Blackites inflatus
Lower boundary GSSP: Gorrondatxe section, Western Pyrenees, Basque Country, Spain; 43°22′47″N 3°00′51″W / 43.3796°N 3.0143°W
Lower GSSP ratified: April 2011