| SANANDREAS | Californian boundary between the Pacific and North American plates, ... Fault (3,7) |
| SANANDREASFAULT | Fracture forming the tectonic boundary between the Pacific and North American Plates (3,7,5) |
| MARMOREAL | Whitish spread to spread over American plates? (9) |
| GOLDENGATE | The _ _ Bridge spans the strait between the Pacific and San Francisco Bay (6,4) |
| AUSTRALIA | The smallest of today's continents and one of the largest countries on Earth, lying between the Pacific and Indian oceans in the Southern Hemisphere. (9) |
| GOLDEN | And 36 The - - - - - - Bridge spans the strait between the Pacific and San Francisco Bay (6,4) |
| GATE | The - - - - - - Bridge spans the strait between the Pacific and San Francisco Bay (6,4) |
| TERMINATOR | Boundary between the illuminated and darkened part of the moon, in astronomy |
| MASONDIXON | Originally the boundary between the US's southern slave states and northern 'free' states, named after its surveyors (5-5) |
| IDAHO | State that's split between the Pacific and Mountain time zones |
| USA | Country between the Pacific and Atlantic Oceans: Abbr. |
| DRAKE | Strait between South America and the South Shetland Islands connecting the Pacific and Atlantic Oceans (5,7) |
| PASSAGE | Strait between South America and the South Shetland Islands which connects the Pacific and Atlantic Oceans (5,7) |
| PERU | South American country on the Pacific and centre of the great Inca Empire (4) |
| STRATOPAUSE | Level of the atmosphere forming the boundary between the stratosphere and the mesosphere, around 30 miles above sea level (11) |
| OCEANIA | The islands of the Pacific and adjacent seas |
| THEARCTICCIRCLE | Boundary between the North Temperate and North Frigid zones |
| STYX | In Greek myths, the river boundary between the Earth and the Underworld (4) |
| MASONDIXONLINE | Historical boundary between the North and South in the U.S. (5,5,4) |
| SHORASHIM | Organisation devoted to building bridges between Israeli and North American Jews (Hebrew = 'roots') (9) |
