The Bouma Sequence.
The bouma sequence is named after A.H.Bouma, is a primary tool for facies representation. This sequence has been divided into 5 parts or beds. These divisions are made according to the Turbidity currents.
The divisions are from A to E.
Where
A- has sand sized grains which are graded gravel at the bottom. They mostly have massive sandstone. Generally devoid of primary structures.
B- this layer consists of parallel laminations which are of sandy nature.
C- consists of cross laminations also consists of ripple marks.
D- this layer consists of laminated silts.
E- hemipelagic mud.
As we do down from E to A there is an increase in energy level.
The below image shows a full Bouma sequence.
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The bouma sequence is named after A.H.Bouma, is a primary tool for facies representation. This sequence has been divided into 5 parts or beds. These divisions are made according to the Turbidity currents.
Where
A- has sand sized grains which are graded gravel at the bottom. They mostly have massive sandstone. Generally devoid of primary structures.
B- this layer consists of parallel laminations which are of sandy nature.
C- consists of cross laminations also consists of ripple marks.
D- this layer consists of laminated silts.
E- hemipelagic mud.
As we do down from E to A there is an increase in energy level.
The below image shows a full Bouma sequence.
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On wordpress
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