Marl is a town and a municipality in the district of Recklinghausen, in North Rhine-Westphalia, Germany. It is situated near the Wesel-Datteln Ca…Marl is a town and a municipality in the district of Recklinghausen, in North Rhine-Westphalia, Germany. It is situated near the Wesel-Datteln Canal, approx. 10 km north-west of Recklinghausen. It has about 90,000 people.