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.