GCMD Chronostratigraphic Units Types Keywords

PRAGIAN

https://gcmd.earthdata.nasa.gov/kms/concept/2c142df4-aede-4962-b141-3b84cea639b0

broader
https://gcmd.earthdata.nasa.gov/kms/concept/599af9b7-4517-45c2-8505-a46fc204e524 original
narrower
2c142df4-aede-4962-b141-3b84cea639b0 original
change note
2019-11-21 08:47:06.0 [tstevens] Insert Concept
add broader relation (PRAGIAN [2c142df4-aede-4962-b141-3b84cea639b0,423485] - LOWER [599af9b7-4517-45c2-8505-a46fc204e524,423461]);
2019-12-17 10:58:43.0 [tstevens]
insert Definition (id: null
text: The Pragian is one of three faunal stages in the Early Devonian epoch. It lasted from 411.2 ± 2.8 million years ago to 407 ± 2.8 million years ago. It was preceded by the Lochkovian stage and followed by the Emsian stage. The most important lagerstätte of the Pragian is Rhynie chert in Scotland.
language code: en);
definition The Pragian is one of three faunal stages in the Early Devonian epoch. It lasted from 411.2 ± 2.8 million years ago to 407 ± 2.8 million years ago. It was preceded by the Lochkovian stage and followed by the Emsian stage. The most important lagerstätte of the Pragian is Rhynie chert in Scotland.
reference
text International Commission on Stratigraphy (http://www.stratigraphy.org/)
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in scheme chronounits original