Oman:
central desert plain, rugged mountains in north and south
Pacific Ocean:
surface currents in the northern Pacific are
dominated by a clockwise, warm-water gyre (broad circular system of
currents) and in the southern Pacific by a counterclockwise,
cool-water gyre; in the northern Pacific, sea ice forms in the
Bering Sea and Sea of Okhotsk in winter; in the southern Pacific,
sea ice from Antarctica reaches its northernmost extent in October;
the ocean floor in the eastern Pacific is dominated by the East
Pacific Rise, while the western Pacific is dissected by deep
trenches, including the Mariana Trench, which is the world's deepest
Pakistan:
flat Indus plain in east; mountains in north and
northwest; Balochistan plateau in west
Palau:
varying geologically from the high, mountainous main island
of Babelthuap to low, coral islands usually fringed by large barrier
reefs
Palmyra Atoll:
very low
Panama:
interior mostly steep, rugged mountains and dissected,
upland plains; coastal areas largely plains and rolling hills
Papua New Guinea:
mostly mountains with coastal lowlands and rolling
foothills
Paracel Islands:
mostly low and flat
Paraguay:
grassy plains and wooded hills east of Rio Paraguay; Gran
Chaco region west of Rio Paraguay mostly low, marshy plain near the
river, and dry forest and thorny scrub elsewhere
Peru:
western coastal plain (costa), high and rugged Andes in center
(sierra), eastern lowland jungle of Amazon Basin (selva)