CH 10:SEC 3 THE CHANGING CONTINENTS

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RIFTING

the process by which earths crust breaks apart

CRATONS

ALL OF CONTINENTS THAT EXIST TODAY CONTAIN LARGE AREAS OF STABLE ROCK

SHIELDS

ROCKS WITHING THE CRATONS THAT HAVE BEEN EXPOSED AT EARTH'S SURFACE

TERRANE

A PIECE OF LITHOSPHERE THAT HAS A UNIQUE GEOLOGIC HISTORY THAT DIFFERS FROM THE HISTORIES OF SUROUNDING LITHOSPHERE

ACCRETION

THE PROCESS IN WHICH A TERRANE BECOMES PART OF A CONTINENT

SEAMOUNTS

UNDERWATER MOUNTAIN

ATOLLS

SMALL CORAL ISLANDS

SUPERCONTINENT CYCLE

THE PROCESS IN WHICH CONTINENTS FORM AND BREAK APART OVER TIME

PANGAEA

THE SUPERCONTINENT THAT FORMED 300 MILLION YEARS AGO

PANTHALASSA

the single large ocean that covered earth's surface during the time the supercontinent pangaea existed

LAURASIA

a hypothetical continent that (according to plate tectonic theory) broke up later into North America and Europe and Asia

GONDWANALAND

a hypothetical continent that (according to plate tectonic theory) broke up later into India and Australia and Africa and South America and Antarctica

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