gonia in south, rugged Andes along western
border

Armenia:
Armenian Highland with mountains; little forest land; fast
flowing rivers; good soil in Aras River valley

Aruba:
flat with a few hills; scant vegetation

Ashmore and Cartier Islands:
low with sand and coral

Atlantic Ocean:
surface usually covered with sea ice in Labrador
Sea, Denmark Strait, and Baltic Sea from October to June; clockwise
warm-water gyre (broad, circular system of currents) in the northern
Atlantic, counterclockwise warm-water gyre in the southern Atlantic;
the ocean floor is dominated by the Mid-Atlantic Ridge, a rugged
north-south centerline for the entire Atlantic basin

Australia:
mostly low plateau with deserts; fertile plain in
southeast

Austria:
in the west and south mostly mountains (Alps); along the
eastern and northern margins mostly flat or gently sloping

Azerbaijan:
large, flat Kur-Araz Ovaligi (Kura-Araks Lowland) (much
of it below sea level) with Great Caucasus Mountains to the north,
Qarabag Yaylasi (Karabakh Upland) in west; Baku lies on Abseron
Yasaqligi (Apsheron Peninsula) that juts into Caspian Sea

Bahamas, The:
long, flat coral formations with some low rounded hills

Bahrain:
mostly low desert plain rising gently to low central
escarpment

Baker Island:
low, nearly level coral island surrounded by a narrow
fringing reef

Bangladesh:
mostly flat alluvial plain; hilly in southeast

Barbados:
relatively flat; rises gently to central highland region

Bassas da India:
volcanic rock

Belarus:
generally flat and contains much marshland

Belgium:
flat coastal plains in northwest, central rolling hills,
rugged mountains of Ardennes Forest in southeast

Belize:
flat, swampy coastal plain; low mountains in south

Benin:
mostly flat to undulating plain; some hills and low mountains

Bermuda:
low hills separated by fertile depressions

Bhutan:
mostly mountainous with some fertile valleys and savanna

Bolivia:
rugged Andes Mountains with a highland plateau (Altiplano),
hills, lowland plains of the Amazon Basin

Bosnia and Herzegovina:
mountains and valleys

Botswana:
predominantly flat to gently rolling tableland; Kalahari
Desert in southwest

Bouvet Island:
volcanic; maximum elevation about 800 m; coast is
mostly inaccessible

Brazil:
mostly flat to rolling lowlands in north; some plains,
hills,