GCMD Chronostratigraphic Units Types Keywords

SILURIAN

https://gcmd.earthdata.nasa.gov/kms/concept/3be2d037-28aa-40c7-8877-530fbcaa2c03

broader
https://gcmd.earthdata.nasa.gov/kms/concept/0e098a6e-2123-4566-9069-6a3401775ca3 original
narrower
3be2d037-28aa-40c7-8877-530fbcaa2c03 original
change note
2019-11-21 09:02:50.0 [tstevens] Insert Concept
add narrower relation (SILURIAN [3be2d037-28aa-40c7-8877-530fbcaa2c03,396411] - PRIDOLI [38271019-de23-4b2e-85ed-15af2f3a11bc,423493]);
2019-11-21 09:03:14.0 [tstevens] Insert Concept
add narrower relation (SILURIAN [3be2d037-28aa-40c7-8877-530fbcaa2c03,396411] - LUDLOW [15256b96-f71f-43d2-8c1b-ab5dca5dd3db,423497]);
2019-11-21 09:03:33.0 [tstevens] Insert Concept
add narrower relation (SILURIAN [3be2d037-28aa-40c7-8877-530fbcaa2c03,396411] - WENLOCK [cda42e0a-bac4-4ca6-b20d-c09b45e8717b,423501]);
2019-11-21 09:03:52.0 [tstevens] Insert Concept
add narrower relation (SILURIAN [3be2d037-28aa-40c7-8877-530fbcaa2c03,396411] - LLANDOVERY [ec205df2-0e6a-4ffe-a7f6-8f20592345f7,423505]);
2019-12-17 12:15:17.0 [tstevens]
insert Definition (id: null
text: The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian Period, 419.2 Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. A significant evolutionary milestone during the Silurian was the diversification of jawed fish and bony fish. Multi-cellular life also began to appear on land in the form of small, bryophyte-like and vascular plants that grew beside lakes, streams, and coastlines, and terrestrial arthropods are also first found on land during the Silurian. However, terrestrial life would not greatly diversify and affect the landscape until the Devonian.
language code: en);
definition The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian Period, 419.2 Mya. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. A significant evolutionary milestone during the Silurian was the diversification of jawed fish and bony fish. Multi-cellular life also began to appear on land in the form of small, bryophyte-like and vascular plants that grew beside lakes, streams, and coastlines, and terrestrial arthropods are also first found on land during the Silurian. However, terrestrial life would not greatly diversify and affect the landscape until the Devonian.
narrower
https://gcmd.earthdata.nasa.gov/kms/concept/15256b96-f71f-43d2-8c1b-ab5dca5dd3db original
broader
3be2d037-28aa-40c7-8877-530fbcaa2c03 original
https://gcmd.earthdata.nasa.gov/kms/concept/38271019-de23-4b2e-85ed-15af2f3a11bc original
broader
3be2d037-28aa-40c7-8877-530fbcaa2c03 original
https://gcmd.earthdata.nasa.gov/kms/concept/cda42e0a-bac4-4ca6-b20d-c09b45e8717b original
broader
3be2d037-28aa-40c7-8877-530fbcaa2c03 original
https://gcmd.earthdata.nasa.gov/kms/concept/ec205df2-0e6a-4ffe-a7f6-8f20592345f7 original
broader
3be2d037-28aa-40c7-8877-530fbcaa2c03 original
reference
text International Commission on Stratigraphy (http://www.stratigraphy.org/)
type
Resource
type
Resource original
Concept original
in scheme chronounits original