July 9 (Reuters) - Corsa Coal Corp CSO.V :
* CORSA COAL ANNOUNCES CEO TRANSITION
* CORSA COAL CORP - GEORGE G. DETHLEFSEN WILL STEP DOWN FROM HIS ROLE AS CHIEF EXECUTIVE OFFICER
* CORSA COAL CORP - WILL APPOINT PETER V. MERRITTS, COMPANY'S CURRENT PRESIDENT OF NORTHERN APPALACHIA DIVISION AS CEO