Glossary beginning with N
- National Historic Landmark
- National Historic Preservation Act of 1966
- National Park Service
- National Park System
- National Register of Historic Places
- Native Americans
- Natural processes
- Natural quiet
- Natural resources
- Navajo Sandstone
- Needles
- Nektonic
- Non-native species
- Non-point sources
- Nonconformity
- Nonsilicate Minerals
- Normal Fault
- Normal Polarity
- North American Datum NAD-27
- North American Datum NAD-83
- Notochord
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