Geography of Mars class at CSULB: DIgression to Earth

• The orders of relief scheme on Earth

• Kind of variable by author, but these schemes are extensions of Nevin Fenneman's 1916 article dividing the physical geography of North America into three nested levels:
• physiographic divisions (e.g., Pacific Mountain System)
• geomorphic provinces (e.g., the Sierra Nevada Province)
• sections (e.g., the California Coast Ranges)