Complex sentence: The Ouachitas are formed by a thick succession of highly deformed Paleozoic strata outcropping for approximately 220 miles in west-central Arkansas and southeast Oklahoma and constituting the Ouachita Fold and Thrust Belt, one of the important orogenic belts of North America.
Split into simpler sentences: The Ouachitas are formed by a thick succession of highly deformed Paleozoic strata outcropping for approximately 220 miles in west-central Arkansas and southeast Oklahoma. This is part of the larger Ouachita Fold and Thrust Belt, one of the important orogenic belts of North America.