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CH3041
THE DEPOSITS
The Deposits:
• Some ASS deposits are from current 
 estuarine or marine sedimentary deposits.
•Most ASS:- Holocene period (104 years b.p.)
• Some ASS:- Tertiary period (106 years b.p.)
• The various state Departments have produced ASS maps which indicate areas of ASS using geomorphological data .
• In coastal sediments humic matter may
also produce acid soil & water but this has
a pH 4.5 - 5.5 and does not intensify when
oxidised. It does not pose a major risk.
Holocene is current period