Manylion am y math o ddogfen lywodraethu sydd gan yr elusen a phan y'i sefydlwyd. Nid dyma destun llawn dogfen lywodraethu'r elusen.
RULES ADOPTED 18/01/1967
AS AMENDED BY SCHEME DATED 18/01/1967
AS AMENDED BY SCHEME DATED 06/01/1995
AS AMENDED ON 01/07/2005
AS AMENDED ON 13/04/2012
AS AMENDED ON 05/07/2013
Gwrthrychau elusennol
TO PROMOTE RESEARCH IN GEOLOGY AND ITS ALLIED SCIENCES BY HOLDING MEETINGS FOR THE READING OF ORIGINAL PAPERS AND THE DELIVERY OF LECTURES AND BY FIELD MEETINGS; TO EXTEND KNOWLEDGE OF THE SCIENCE BY DEMONSTRATION AND PUBLICATION; BY THE FORMATION OF A LIBRARY, AND BY SUCH OTHER MEANS AS THE COUNCIL MAY FROM TIME TO TIME DETERMINE.
Maes buddion
Y maes y gall yr elusen weithredu ynddo, fel y nodir yn ei dogfen lywodraethu.
