ASPH

a small basin containing naturally occurring asphalt

asphalt lake

ATOL

a ring-shaped coral reef which has closely spaced islands on it encircling a lagoon

atoll(s)

BAR

a shallow ridge or mound of coarse unconsolidated material in a stream channel, at the mouth of a stream, estuary, or lagoon and in the wave-break zone along coasts

bar

BCH

a shore zone of coarse unconsolidated sediment that extends from the low-water line to the highest reach of storm waves

beach

BCHS

a shore zone of coarse unconsolidated sediment that extends from the low-water line to the highest reach of storm waves

beaches

BDLD

an area characterized by a maze of very closely spaced, deep, narrow, steep-sided ravines, and sharp crests and pinnacles

badlands

BLDR

a high altitude or high latitude bare, flat area covered with large angular rocks

boulder field

BLHL

a hole in coastal rock through which sea water is forced by a rising tide or waves and spurted through an outlet into the air

blowhole(s)

BLOW

a small depression in sandy terrain, caused by wind erosion

blowout(s)

BNCH

a long, narrow bedrock platform bounded by steeper slopes above and below, usually overlooking a waterbody

bench

BUTE

a small, isolated, usually flat-topped hill with steep sides

butte(s)

CAPE

a land area, more prominent than a point, projecting into the sea and marking a notable change in coastal direction

cape

CFT

a deep narrow slot, notch, or groove in a coastal cliff

cleft(s)

CLDA

a depression measuring kilometers across formed by the collapse of a volcanic mountain

caldera

CLF

a high, steep to perpendicular slope overlooking a waterbody or lower area

cliff(s)

CNYN

a deep, narrow valley with steep sides cutting into a plateau or mountainous area

canyon

CONE

a conical landform composed of mud or volcanic material

cone(s)

CRDR

a strip or area of land having significance as an access way

corridor

CRQ

a bowl-like hollow partially surrounded by cliffs or steep slopes at the head of a glaciated valley

cirque

CRQS

bowl-like hollows partially surrounded by cliffs or steep slopes at the head of a glaciated valley

cirques