Download 8 Sedimentary basins

UNIT
8
Surface process
SEDIMENTARY BASINS
Biology and Geology 3. Secondary Education
UNIT
UNIT
8
3
Sedimentary basins
A sedimentary basin is an area of the earth’s crust that has been
subjected to progressive sinking, and where sediments from the erosion
of the rocks around it accumulate.
Accumulated
layers of
sediment on
the bottom of
the basin
Erosion
Erosion
Basin
Sinking
Biology and Geology 3. Secondary Education
UNIT
UNIT
8
3
Sedimentary basins
Sedimentary basins can be found in different parts of the earth’s crust.
For example:
In the interior of continental areas.
They occupy low areas where river courses generally flow, or where
there are lakes and lagoons. The streams flowing down the slopes
also deposit sediment in them.
Biology and Geology 3. Secondary Education
UNIT
UNIT
8
3
Sedimentary basins
Sedimentary basins can be found in different parts of the earth’s crust.
For example:
In coastal areas.
They occupy the areas where major rivers flow into the sea. When
these basins are filled in, they usually form swamps or deltas.
Biology and Geology 3. Secondary Education