So you are saying that the Roma Rota is able to dissolve, put asunder, a valid marriage?
Yes when it is unconsummated."Article 126 of the Apostolic Constitution ‘Pastor Bonus’ is modified to read as follows:
"1. The Tribunal of the Roman Rota is a court of higher instance at the Apostolic See, usually at the appellate stage, with the purpose of safeguarding rights within the Church; it fosters unity of jurisprudence,
and, by virtue of its own decisions, provides assistance to lower tribunals.
"2. An office shall be established in this Tribunal with the task of examining the fact of non-consummation in a marriage and the existence of a just cause for granting a dispensation. It receives all the acts together with the ‘votum’ of the bishop and the remarks of the defender of the bond, weighs them according to its own special procedure, and, if the case warrants it, submits a petition to the Supreme Pontiff requesting the
dispensation.
“3. The same office is also competent to examine cases concerning the nullity of sacred ordination, in accordance with universal and specific law, ‘congrua congruis referendo’”.
rorate-caeli.blogspot.com/2011/09/motu-proprio-quaerit-semper.html
Canon 1123
Whenever a marriage is validated for the external forum, or declared invalid, or lawfully dissolved other than by death, the parish priest of the place of the celebration of the marriage must be informed, so that an entry may be duly made in the registers of marriage and of baptism.
Canon 1142
A non-consummated marriage between baptised persons or between a baptised party and an unbaptised party can be dissolved by the Roman Pontiff for a just reason, at the request of both parties or of either party, even if the other is unwilling.
Canon 1061
1 A valid marriage between baptised persons is said to be merely ratified, if it is not consummated; ratified and consummated, if the spouses have in a human manner engaged together in a conjugal act in itself apt for the generation of offspring. To this act marriage is by its nature ordered and by it the spouses become one flesh.
2 If the spouses have lived together after the celebration of their marriage, consummation is presumed until the contrary is proven.
catholicdoors.com/misc/marriage/canonlaw.htm