Glossary of Terms

Measurements used as a basis for future comparisons.
Basin and Range
Stretching from northwestern Mexico to the southern Oregon and Idaho, this large physiographic region is defined by long mountain chains separated by wide, arid valleys. The dramatic differences found in elevation and geography are due to violent tectonic activity which started around 17 million years ago.
The measurement of depth of water in oceans, seas, or lakes.
A landform which borders a body of water such as an ocean, sea, river or lake; and usually consists of loose materials such as sand, gravel, pebbles or cobblestones.
Beach profile
A cross-section taken perpendicular to a given beach contour.
Of or relating to the deepest parts of the ocean.
Bering Land Bridge
A strip of land that connected present-day eastern Siberia and Alaska during Earth's historic ice ages. The land was exposed when ocean levels dramatically decreased due to more water being frozen in large glaciers.
Bering Sea
An area of the north Pacific Ocean located between Siberia (Russia) and Alaska (United States).
A flat, terrace-like area of sand just above the high-tide zone on a beach.
The action whereby the concentration of a chemical in an organism increases over time compared to the chemical’s concentration in the environment.

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