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trough

Type: Glossary

low pressure area between two high pressure areas

Type: Glossary

the angle measurement between an observer, an object and true north

Type: Glossary

point through which all lines of longitude pass

true soil

Type: Glossary

fertile topsoil

tsunami

Type: Glossary

ocean wave set in motion by crustal movement

tuff

Type: Glossary

volcanic dust

Type: Glossary

river that has a gradient that is insufficient to give it the energy to transport its load...

uplift

Type: Glossary

when land is raised to a higher level

Type: Glossary

when the deeper colder waters rise to the surface

Type: Glossary

areas in a city become run down and buildings decay

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