| Canada, 586 | distribution, 537 |
| Persian Gulf, 396 | |
| Iraq, 346 | Perth, Australia, 394 |
| Peru | |
| Andean Cordillera, 76 | Andean Mountains, 220 |
| Lake Titicaca, 442 | Ucayali River, 308 |
| Phobos, Martian moon, 616 | Physiography, 1 |
| Piedmont glacier, Alaska, 550 | Pilbara block, Australia, 158 |
| Pinacate lava field, 480 | Pinacate volcanic field, Arizona, 198 |
| Pindus Mountains, Greece, 88 | Pine Island Glacier, Antarctica, 558 |
| Pine Mountain Thrust, Kentucky, 58 | Pingos, Mackenzie River delta, 340 |
| Plain of Reeds, Vietnam, 334 | Planation surfaces, 8, 10 |
| Planetary geomorphology, 10 | Planetary landforms, 597 |
| Planetary surfaces, 11 | |
| Planets | |
| atmosphere, 597 | composition, 597 |
| crustal evolution, 597 | geomorphic evolution,597 |
| gravity, 597 | relative size, 597 |
| surface temperature, 598 | time scales, 599 |
| Plate collision, 30 | |
| Plate-tectonic classification, 30 | Plateau basalts, India, 238 |
| Playa lakes, Iran, 292 | Playas, Nevada, 38 |
| Plinian volcanism, 187 | Plutons, 172 |
| Pluvial episodes, 18 | Pluvial fans, Jordan, 266 |
| Pluvial lake, Lake Bonneville, Utah, 436 | Po Basin, 82 |
| Point Barrow, Alaska, 430 | Polar deserts, 448 |
| Polje, Yugoslavia, 422 | Potato Hills, 60 |
| Potomac River, Maryland, 400 | Potosi, Bolivia, 74 |
| Powder River Basin, Wyoming, 42 | Pre-Alps, 82 |
| Primary coasts, 353 | Process studies, 4 |
| Proglacial lake, Iceland, 582 | Puna Plateau, Andean Mountains, 220 |
| Qa Al Jafr, Isreal-Jordan, 266 | Qaidam Basin, China, 150 |
| Qilian Shan Mountains, China,294 | Quantitative geomorphology, 5, 660 |
| Queensland, Australia, 6 | |
| Radar, 683 | Radar imagery, Venus, 618, 622 |
| Rain-shadow deserts, 448 | |
| Ramghar, India, 174 | Ranns of Kutch, India, 398 |
| Rectangular drainage, 255 | |
| Algeria, 170 | Red River fault zone, China, 154 |
| Red Sea, 110, 236 | Red Sea escarpment, 118 |
| Reef distribution, hypotheses, 388 | Regmatic shears, 658 |
| Remote sensing | |
| data displays, 681 | EM radiation, 680 |
| image enhancement, 686 | instrumentation, 681 |
| land cover categories, 683 | mapping applications, 643 |
| MSS, 682 | principles of, 679 |
| radar, 683 | thermal infrared, 68 |
| Rhea coasts, 630 | Rhodesia (also see Zimbabwe), 104 |
| Ria coast | |
| Adriatic Sea, 370 | Ireland, 368 |
| Korea, 356 | Richât structure, Mauritania, 98 |
| Rifting, 31 | Rio Caroní, Venezuela, 274 |
| Rio Grande do Sul, Brazil, 362 | Rio Huallaga, Peru, 76 |
| Rio Magdalena, Colombia, 72 | Rio Maranon, Peru, 76 |
| Rio Negro, Brazil, 302 | Rio Santa Valley, Peru, 76 |
| Rio Taquari fan, Brazil, 300 | Rivers, largest, 256 |
| Riyadh, Saudi Arabia, 16 | Roan Cliffs, Utah, 44 |
| Rock glaciers, 5 | Rock Springs Uplift, 46 |
| Rocky Mountain Trench, 48 | Rocky Mountains, 32, 42 |
| Romania, Danube River delta, 324 | Ross Ice Shelf, Antarctica, 540 |
| Rub Al Khali basin, Arabia, 118 | |
| Sabkha, 398 | |
| Iran, 292 | Persian Gulf, 396 |
| Sahara Desert | |
| Erg Chech, 462, 466 | |
| Grand Erg Occidental, 464 | Grand Erg Oriental, 468 |
| Lake Chad, 472 | Tanezrouft Basin, Algeria, 470 |
| Salar de Coipasa, Bolivia, 438 | Salar de Uyuni, Bolivia, 438 |
| Salton Sea, 34 | San Andreas fault, 34, 36 |
| San Francisco Mountains, Arizona, 196 | San Juan Mountains, Colorado, 12, 42 |
| San Rafael Swell, Utah, 12, 44 | |
| Sand sea | |
| Ad Dahna, Saudi Arabia, 16 | Lut Desert, Iran, 498 |
| Sand sheet, Sudan, 18 | Sand spit, Brazil, 362 |
| Sandia Mountains, New Mexico, 12 | Sandur, Iceland, 580 |
| Santa Marta fault system, Colombia, 72 | São Francisco River, Brazil, 324 |
| Satellite systems, 679 | Saturn, satellites of, 630 |
| Saudi Arabia | |
| dome dunes, 458 | Riyadh, 16 |
| star, crescentic dunes, 460 | volcanism, 236 |
| Scale, 1 | Scottish Highlands, 78 |
| Sea of Galilee, 112 | SeaMARC I, 659 |
| Searles Lake, 484 | Seasat, glaciers, Alaska, 554 |
| Secondary coasts, 353 | Selima Sand Sheet, North Africa, 7, 18, 659 |
| Semail Ophiolites, Oman,120 | Serengeti Plain, Africa, 230 |
| Serra Da Cangalha, Brazil, 174 | Serrania de Perija, Colombia, 72 |
| Seto inland sea, Japan, 156 | Shanghai, China, 330 |
| Shanxi Province, China, 262 | Shatt el Arab delta, Iraq, 319, 346 |
| Shield volcano | |
| Hawaii, 212 | Iceland, 222 |
| Olympus Mons, Mars, 610 | Shields, 31 |
| Shields, cratonic, 170 | Shillong Plateau, 284 |
| Shoreline, defined, 353 | Shuttle Imaging Radar (see SIR-A) |
| Siberian Lowland, 428 | Siberian Ranges, 92 |
| Sibi Trough, Pakistan, 130 | Sichuan Basin, China, 152 |
| Sierra Madre Oriental, Mexico, 70 | Sierra Nevada de Santa Marta, Colombia, 72 |
| Sierra Nevada Mountains, 34 | Sierra Nevada province, 32 |