The study, undertaken by the British Geological Survey, provides a comprehensive summary of all the currently available information on the resource, both onshore and immediately offshore.
Mae'r astudiaeth, a gynhahliwyd gan y British Geological Survey, yn rhoi crynodeb cynhwysfawr o'r holl wybodaeth sydd ar gael ar hyn o bryd am yr adnodd, ar y môr ac ar y tir.