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25 terms

Social studies New material Chapter 1

STUDY
PLAY
Aquifer
an underground water reservior
Bar
an underwater barrier of mud in a river
Barrier Island
an island running parallel to the mainland, built up by the action of waves and currents that serves to protect the coast from erosion.
Brackish
fresh water and salt water mixed together
Chenier
a ridge of high ground in the costal marsh that runs parallel to the coastline
Coastal erosion
the loss of coastal land
Coastal marsh
wet grassland along a coastline
Coastal plain
a low, flat land region built up by river sediment
Continental drift
the gradual movement of continents
Delta
a landform shaped by sediment deposits at the mouth of a river or tidal inlet
Fault
a fracture in the Earths crust
Floodplain
a plain bordering a river and subject to flooding
Geology
the study of how the earth was formed
Global warming
an increase in the average temperature of the Earths atmosphere
Meander
to wind or turn
Natural levee
strips of elevated land along the river side to keep it from flooding
Oxbow lake
a cresent shaped lake formed when a river meander is cut off from the main channel
Pangaea
an ancient supercontinent that included all the landmass of the Earth
Reservoir
a natural or artificial pond or lake used for water storage
Salt dome
a tall vertical column of salt squeezed up through the ground by extreme pressure
Salt water intrusion
saltwater movement into a marsh
Sediment
suspended particles of dirt and sand carried by river water
Terrace
an elevated ridge of old riverbed
Water table
the depth in the ground at which water is located
Sedimentary rock
rock formed by sediment and pressure