Adrodd fel Amhriodol

' This is a subsidence hollow caused by the dissolution of gypsum beneath the area '

Dywedwch wrthym pam mae’r cynnwys hwn yn amhriodol *(gofynnol)

Dewis categori *(gofynnol)

Os ‘Arall’ rhowch fanylion (dewisol)

Eich enw (dewisol)

Eich cyfeiriad e-bost (dewisol)

CAPTCHA

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.