'%' can be used as a wildcard (eg. 197% returns all 1970's data) Dates displayed are those of the year that the degree was awarded and not necessarily the date on the cover of the thesis. Dates are often not included with non-degree thesis related collections.
Choose search by Geological Time and select Recent under Cenozoic-Quaternary.
Collections from offshore locations close to the coastline (eg Cardigan Bay) are included under the country name (eg British Isles, Wales) unless they are from named seas/oceans (eg North Sea, Celtic Sea).
At present this section of the database is incomplete so a return of "none" does not imply that there are no associated publications.