| Site | Nonsite |
| 1. Open Limits | Closed Limits |
| 2. A Series of Points | An Array of Matter |
| 3. Outer Coordinates | Inner Coordinates |
| 4. Subtraction | Addition |
| 5. Indeterminate Certainty | Determinate Uncertainty |
| 6. Scattered Information | Contained Information |
| 7. Reflection | Mirror |
| 8. Edge | Center |
| 9. Some Place (physical) | No Place (abstract) |
| 10. Many | One |
Footnote 1 from Robert Smithon's essay The Spiral Jetty (1972).
Originally published in Arts of the Environment, Gyorgy Kepes, ed. pp.222-232
Reprinted in Robert Smithson: The Collected Writings, Jack Flam, ed. pp.143-153
