20-12-2012, 06:26 PM
Geology Of Aurangabad
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In order To Carry out this study , Aurangabad Muncipal Cooperation visited 154 wells.
On the Basis of this survey , by observing the vertical section of well containing open rocks , the geology of Aurangabad is studied.
It is very difficult to study the geology of Aurangabad as there are no open rocks.
In Aurangabad mostly compact Basalt is found.
In some areas vesicular Basalt is also found.
There are also some red colored or green colored bole belts present having width 1cm to 3cm.
There are Kari dykes spread in different parts of Aurangabad.
The Level of ground water is different at different places.
In Aurangabad There may be water at one place but at a distance of 50 to 60m the other well may be completely dry.
Soil and Murum
Murum and Soil are found in abundance near nallas.
Near the nallas the thickness of this layer is around 10m.
The thickness of this layer goes on decreasing moving towards the hills.
The level of ground water is directly proportional to thickness of this layer.
This is concluded from 22% of wells surveyed of Aurangabad.
Intensity Of Weathering
Vesicular Basalt and Amygdaloidal both subjected to weathering in different quantities.
Due to Fractures in vesicular Basalt , it is subjected to quick weathering.
In 19.68% of wells of Aurangabad , vertical holes are found.
There are air gaps present in Amygdaloidal basalt.
These air gaps are not interconnected and as a result it requires more time for weathering.
These air gaps contains chlorophyaalt minerals mineral, then fast weathering take place.
Fractures in Rocks
When the lava cools in vesicular basalt cracks or fractures are developed in different directions.
If the Cracks or Fractures are near each other ground water is available is more.
Because of rocks bonding with each other , ground water is found at a depth of 5 to 30m between the fractures.
Sometimes fractures are horizontal while sometimes they are vertical.
Layer of fractured basalt
Between two layers of basalt if the upper layer is weathered and in that secondary fractures are developed , and if fractures are developed at a certain depth of a bottom layer then generally ground water table is 50m below the surface of the earth.
The more the thickness of the fracture , More is the ground water available.
From the above all explanation It can be concluded that the ground water level is uneven in Aurangabad.