Before revision: Generally speaking, upland (or uplands) refers to ranges of hills,University of California Museum of Paleontology (1995 and later), upland, UCMP Glossary typically from up to while highland (or highlands) is usually reserved for ranges of low mountains.
After revision: Generally , upland refers to a range of hills,University of California Museum of Paleontology (1995 and later), upland, UCMP Glossary typically from up to , while highland is usually reserved for ranges of low mountains.