The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
An Ordered List of BGS Geochronostratigraphy ranks
http://data.bgs.ac.uk/id/Geochronology/Rank/AGE http://data.bgs.ac.uk/id/Geochronology/Rank/EON http://data.bgs.ac.uk/id/Geochronology/Rank/EPOCH http://data.bgs.ac.uk/id/Geochronology/Rank/ERA http://data.bgs.ac.uk/id/Geochronology/Rank/MIS http://data.bgs.ac.uk/id/Geochronology/Rank/PERIOD http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-AGE http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-EPOCH http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-ERA http://data.bgs.ac.uk/id/Geochronology/Rank/SUB-PERIOD