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Llinell 5: [[Crug crwn]] enfawr a godwyd gan bobl [[Oes yr Efydd]] fel rhan o'u seremonïau neu i gladdu'r meirw ydy '''Crugiau Castellmartin''', yng nghymuned [[Castellmartin]], [[Sir Benfro]]; {{gbmapping\|SR905972}}. Cofrestrwyd y crug hwn gan [[Cadw]] a chaiff ei adnabod gyda'r rhif SAM: PE315.<ref>[http://www.whatdotheyknow.com/request/15714/response/38315/attach/html/2/SAMs%20by%20UA.xls.html Cofrestr Cadw.]</ref> Mae'n mesur 38 [[metr]] wrth 2.1m. Cafwyd cloddfa archaeolegol yma yn 2006 a arweiniodd at ddiffinio'r ardal fel mynwent ganoloesol.<ref>[{{Cite web \|url=http://www.coflein.gov.uk/cy/safle/94225/manylion/BROWNSLADE+ROUND+BARROW%2C+CASTLEMARTIN/ \|title=Crug Brownslade; Gwefan Coflein] \|access-date=2010-11-09 \|archive-date=2016-03-04 \|archive-url=https://web.archive.org/web/20160304203624/http://www.coflein.gov.uk/cy/safle/94225/manylion/BROWNSLADE+ROUND+BARROW,+CASTLEMARTIN/ \|url-status=dead }}</ref> Ceir bron i 400 o grugiau crynion ar y gofrestr; mwy nag unrhyw fath arall o heneb. Llinell 12: ==Dau grug arall== * SR889974: 16 wrth 1.6m.<ref>[http://www.coflein.gov.uk/cy/safle/305406/manylion/CROW+BACK+BARROW%3BFREYNESLAKE+TUMULUS%3BFRAYNES+LAKE+BAY%2C+TUMULUS/ Gwefan Coflein]{{Dolen marw\|date=March 2021 \|bot=InternetArchiveBot \|fix-attempted=yes }}</ref> * SR888969: 12 wrth 0.9m.<ref>[{{Cite web \|url=http://www.coflein.gov.uk/cy/safle/305404/manylion/LINNEY+HEAD%2C+BARROW%3BLINNEY+BURROWS%2C+BARROW/] \|title=copi archif \|access-date=2010-11-09 \|archive-date=2016-03-04 \|archive-url=https://web.archive.org/web/20160304202126/http://www.coflein.gov.uk/cy/safle/305404/manylion/LINNEY+HEAD,+BARROW;LINNEY+BURROWS,+BARROW/ \|url-status=dead }}</ref> ==Gweler hefyd==

Crugiau Castellmartin: Gwahaniaeth rhwng fersiynau