<p>This dataset is being <a href="https://github.com/GeoscienceAustralia/geosciml.org/blob/master/resource/static/vocabulary/timescale/">maintained
in GitHub</a></p>
<p>Please report errors, or propose improvements, using the <a href="https://github.com/GeoscienceAustralia/geosciml.org/issues">GitHub
issue-tracker</a>.
1. THORS ontology updated to align with OWL-Time (instead of ISO 19108). 2. GTS ontology updated to use sam-lite (instead of OWL implementation of ISO 19156)
with a lightweight SOSA alignment 3. Spatial data uses GeoSPARQL (instead of OWL implementation of ISO 19107)
2009-05-01 Introduced Holocene subdivisions, as shown in 2018 version from stratigraphy.org
- see
2017-02-22 Added additional collections for eras of each rank; classified rank-based collections using XKOS; cleaned out legacy Base* instances that did not have links; renamed *[GS]SP individuals to *SP; removed all boundaries as TopConcepts, leaving on PreCambrian and Phanerozoic as TopConcepts
2017/02 - Paleogene: Base of Chattian: The numeric age is updated to that at the ratified
GSSP (27.82 Ma; Nanno et al. exp. 2017; by request of Simonetti Monechi)
2018-09-27 fixed some broken namespaces and prefixes, mostly related to SPARQL - some
kind of search/replace error
2019-05-01 - Updated to 2018-08 version; removed StratigraphicPoints, Ranks, TimePositions collections; nested sub-collections in GeochronologicEra
2019-06-10 - This revision adjusts the nomenclature of units to use only chronologic
terminology rather than stratigraphic terminology [e.g. Cambrian-Age 2 in place of
Cambrian-Stage 2; Cambrian-Epoch 2 in place of Cambrian-Series 2; Early/Late in place
of Lower/Upper (namely in application to Epoch/time units rather than their equivalent
Series/stratigraphic units—e.g. Early Jurassic Epoch rather than Lower Jurassic Series)];
and the whole artefact is renamed ‘Geologic Time Scale’. Also: changed samfl:shape --> geo:hasGeometry
Added informal definition of chronometric temporal reference system - Millions of
years, counting backwards from 1950
See <http://stratigraphy.org/ICSchart/ChangeLog2012-2013-2014-2015-2016-2017-2018.txt>
for changes from prior versions
RDF representation of the Geologic Time Scale, as defined in the International Chronostratigraphic
Chart (ICC) from the International Commission on Stratigraphy (ICS). The ICC embraces
both chronostratigraphic (time-rock) units and their equivalent geochronologic (geologic-time)
units, the former being related to the ‘Stratigraphic points’ referred to below, and
the latter (geochronologic units) being employed in this RDF representation.
