GCMD Chronostratigraphic Units Types Keywords

MIDDLE

https://gcmd.earthdata.nasa.gov/kms/concept/62e5494d-c515-47dc-a4af-f870874add3d

broader
https://gcmd.earthdata.nasa.gov/kms/concept/866fbfc3-7395-4a77-bc1e-29272e8b795c original
narrower
62e5494d-c515-47dc-a4af-f870874add3d original
change note
2019-11-21 08:37:39.0 [tstevens] Insert Concept
add broader relation (MIDDLE [62e5494d-c515-47dc-a4af-f870874add3d,423457] - DEVONIAN [866fbfc3-7395-4a77-bc1e-29272e8b795c,396453]);
2019-11-21 08:46:06.0 [tstevens] Insert Concept
add narrower relation (MIDDLE [62e5494d-c515-47dc-a4af-f870874add3d,423457] - GIVETIAN [f6913b28-5a77-4042-97ef-fcbf743c2982,423473]);
2019-11-21 08:46:25.0 [tstevens] Insert Concept
add narrower relation (MIDDLE [62e5494d-c515-47dc-a4af-f870874add3d,423457] - EIFELIAN [d002ab48-1cd0-42e3-9fc1-608db632e75c,423477]);
2019-12-19 08:13:14.0 [tstevens]
insert Definition (id: null
text: The Middle Devonian began 393.3± 2.7 million years ago. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts.
language code: en);
definition The Middle Devonian began 393.3± 2.7 million years ago. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed little from their nautiloid counterparts.
narrower
https://gcmd.earthdata.nasa.gov/kms/concept/d002ab48-1cd0-42e3-9fc1-608db632e75c original
broader
62e5494d-c515-47dc-a4af-f870874add3d original
https://gcmd.earthdata.nasa.gov/kms/concept/f6913b28-5a77-4042-97ef-fcbf743c2982 original
broader
62e5494d-c515-47dc-a4af-f870874add3d original
reference
text International Commission on Stratigraphy (http://www.stratigraphy.org/)
type
Resource
type
Resource original
Concept original
in scheme chronounits original