Memorial services for John Mark DeCook, age 80, of Pella, will be held at 11:00 am, Tuesday, August 17, at the Third Church in Pella.Visitation will begin at 2:00 pm, Monday, August 16, at the Third Church, with family present from 5:00 to 7:00 pm. A private family committal will be held Tuesday, August 17, with a procession forming at Third Church at 9:00 am. The Garden Chapel Funeral Home is in charge of arrangements.