Y gwahaniaeth rhwng diwygiadau o "Crug y Bryncws"

Ychwanegwyd 191 beit ,  7 mis yn ôl
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Cofrestrwyd y crug hwn gan [[Cadw]] a chaiff ei adnabod gyda'r rhif SAM: PE326.<ref>[http://www.whatdotheyknow.com/request/15714/response/38315/attach/html/2/SAMs%20by%20UA.xls.html Cofrestr Cadw.]</ref>
 
Ceir bron i 400 o grugiau crynion ar y gofrestr; mwy nag unrhyw fath arall o heneb. Codwyd crugiau crynion yn gyntaf tua 3000 C.C. a pharhaodd yr arfer hyd at ddiwedd [[Oes yr Efydd]] (tua 600 C.C.) gyda'r mwyafrif ohonyn nhw'n cael eu codi rhwng 2400 - 1500 C.C.<ref>[{{Cite web |url=http://www.eng-h.gov.uk/mpp/mcd/jump3top.htm |title=English Heritage] |access-date=2010-11-10 |archive-date=2012-11-06 |archive-url=https://web.archive.org/web/20121106234736/http://www.eng-h.gov.uk/mpp/mcd/jump3top.htm |url-status=dead }}</ref>
 
==Gweler hefyd==