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The
geological sequence of
the formations observed in Nagpur City is given in table below.
The
local geology of the area indicates following sequence
The
Lametas are flaviatile or estuarine beds overlying the metamorphic
rocks belonging to Sausar Series of Dharwar systems.
Lametas also accurse as a narrow fringe around deccan trap in
Central Part of the city. The
exposures can be seen near G. S. Commerce College & Sitabuldi
Fort ground. The Chief
rocks Constituting Lametas are Sandstone and clays having a total
thickness of 10 m. The
sandstones arte white, yellow, red & violet in colour consisting
of quartz and felspar and occasional pieces of flint & Cherts.
They are fine to medium grained with silicaceous and
calcareous cementing material.
The water bearing properties of the Lametas largely depends
upon the nature of the constituent rocks.
The sandstone and gritty sandstone having high porosity &
permeability are fairly rich aquifers clays due to their plasticity
behaves more or less like aquiclude.
Groundwater exists under water table conditions, in the
Lametas which have a fairly rich groundwater potential in their
porous and permissible sandstone. As
per the available information following aquifer parameters of the
Lametas are observed
The
seasonal fluctuation of water level in lametas varies from 2.50 –
7.25. the chemical
constituents in groundwater occurring in Lametsa is given as under.
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