LONAR LAKE: HC SEEKS
REPORT ON COLOUR CHANGE
The Nagpur Bench of
Bombay High Court has sought reports on the environmental impact assessment of
Lonar Lake from Nationals Environment Engineering Research Institute (NEERI)
and the Geological Survey of India
Raising concerns over
the lake water which has turned pink in colour
As per Dr. Wright’s
findings, there is a glass formation over the surface of the bed rock of the
Lonar crater, which is a basalt rock
This is a new feature
not found anywhere else on the Earth and only on the beds of craters existing
on moon
Lonar Lake, also known as Lonar crater: A notified National Geo-heritage Monument, saline,
soda lake,
located at Lonar
in Buldhana district, Maharashtra,
India
Lonar Lake lies within the only known
extraterrestrial impact crater found within the great Deccan Traps,
a huge basaltic
formation in India
It is one of the four known, hyper-velocity, impact
craters in basaltic rock
anywhere on Earth. The other three basaltic impact structures are in southern
Brazil
Chemical characteristics of the lake shows two
distinct regions that do not mix – an outer neutral (pH 7) and an inner alkaline
(pH 11) each with its own flora and fauna
Water of the lake contains various salts and sodas
A series of small hills surround the basin, which
has an oval shape, almost round, with a circumference at top of about 8 km
(five miles)
Two small streams, named Purna and Penganga,
drain into the lake, and a well of fresh water
is located on the southern side, close to the water's edge
Geological features of the Lonar crater have been
divided into five distinguishable zones, exhibiting distinct geomorphic
characteristics.
The five zones are: The outermost ejecta blanket, the crater rim, the slopes of
the crater, the crater basin, excluding lake, and the crater lake
Gaylussite is the mineral has been recently reported from
drill core in Lonar lake. Gaylussite is a carbonate
mineral, a hydrated sodium calcium carbonate
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