The study deals with the geomorphic evolution of Haryana-Punjab
Plain, located in the middle of Indo-Ganjetic foreland basin.
Geophysical studies indicate presence of Delhi-Ambala Basement High
as a subsurface continuation of Aravalli-Delhi Massif. The sediment
input in Haryana-Punjab Plain occurs at a rate in excess of the
down flexing of the lithosphere. Thus, the basin is oversupplied
and built at 300-150 m above present sea level, in different parts.
Surface profiles drawn across the Plain indicate that most of the
streams, which are ephimeral at present occupy wide valleys
indicating a wetter period in the past when these streams flew
perennially. Surface profiles across Himalayan trend indicate
presence of sharp bluffs produced due to neotectonic movements
related to Himalayan orogeny. Drainage morphometry of the basins
located on either side of Ganga-Indus water divide, indicate
tectonic movement along Delhi-Ambala basement high tilting the
basins, creating an arched upland surface and related terminal
fans. The mighty vedic Saraswati River, as described in Rigveda,
might have disrupted due to neotectonic activities and onset of
drier climate in the past.
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