Late Pleistocene alluvial plain sedimentation in Lower Narmada Valley, Western India: Palaeoenvironmental implications

Rock varnish microlamination dating of late Quaternary geomorphic features in the drylands of western USA

“…In other words, fan surfaces of these eight different units indicate that aggradation of alluvial fans has been fairly continuous for the past 300 ky. These results are consistent with many studies in global research on desert alluvial fans (Harvey, 2002b), particularly with studies finding specific connections to fan aggradation during wet Milankovitch-scale periods (Ritz et al, 2003;Bhandari et al, 2005;Owen et al, 2006), dry Milankovitch-scale periods (Chamyal et al, 2003;Hetzel et al, 2004;Pope and Wilkinson, 2005), and transitions from wet to dry (Carignano, 1999;Klinger et al, 2003) and dry to wet (Roberts and Barker, 1993;Eriksson et al, 2000;Jain and Tandon, 2003;Al Farraj and Harvey, 2004).…”

The southern dispersal hypothesis and the South Asian archaeological record: Examination of dispersal routes through GIS analysis

“…Major terrestrial features, such as the Indus and Ganges Rivers and tributaries, have shifted their locations across the landscape (Chattopadhyaya, 1996;Schuldenrein, 2002), and produced extensive Holocene-aged deposits that overlie earlier Pleistocene-aged ones. Uplift and regional aridity have changed the activity patterns of fresh water sources, and either increased or decreased sediment loads in major drainages (Bhandari et al, 2005;Enzel et al, 1999;Kar et al, 2001;Srivastava et al, 2003). These and other changes suggest that environmental dynamism and localized transitions are the norm for South Asia, and modern reconstructions must take these paleogeographic features into account as much as possible.…”

Field trip in the semi-arid Gujarat Alluvial Plain : report

“…The sediments forming the plain were deposited in a sedimentary basin undergoing slow subsidence along the active Narmada-Son Fault tectonic fault (NSF) with the course of ENE-WSW and length of over Report 1000 km (Chamyal et al 2002). The roof part of the basin is filled with 40-50 m thick alluvium from the Upper (Late) Pleistocene, uncovered as a result of river incision caused by tectonic uplifting of the area in the Early Holocene (Bhandari et al 2005). …”

“…The onset of aeolian activity is associated with a decrease in the SW monsoon circulation and a clear aridisation of the climate during the LGM. The lack of aeolian sediments in the Narmada outcrops and their presence in the Orsang river valley (the right-bank tributary of the Narmada) and in the Mahi valley suggest that the southern boundary of aeolian sediment accumulation during LGM was near the Narmada valley (Bhandari et al 2005).…”