nated 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)

Philippines
mostly mountains with narrow to extensive coastal
lowlands

Pitcairn Islands
rugged volcanic formation; rocky coastline with
cliffs

Poland
mostly flat plain; mountains along southern border

Portugal
mountainous north of the Tagus River, rolling plains in
south

Puerto Rico
mostly mountains with coastal plain belt in north;
mountains precipitous to sea on west coast; sandy beaches along most
coastal areas

Qatar
mostly flat and barren desert covered with loose sand and
gravel

Romania
central Transylvanian Basin is separated from the Plain of
Moldavia on the east by the Carpathian Mountains and separated from
the Walachian Plain on the south by the Transylvanian Alps

Russia
broad plain with low hills west of Urals; vast coniferous
forest and tundra in Siberia; uplands and mountains along southern
border regions

Rwanda
mostly grassy uplands and hills; relief is mountainous with
altitude declining from west to east

Saint Helena
the islands of this group result from volcanic activity
associated with the Atlantic Mid-Ocean Ridge
Saint Helena: rugged, volcanic; small scattered plateaus and plains
Ascension: surface covered by lava flows and cinder cones of 44
dormant volcanoes; ground rises to the east
Tristan da Cunha: sheer cliffs line the coastline of the nearly
circular island; the flanks of the central volcanic peak are deeply