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Dating method glaciation
In contrast to relative dating techniques whereby artifacts were simply designated as "older" or "younger" than other cultural remains based on the presence of fossils or stratigraphic position, 14C dating provided an easy and increasingly accessible way for archaeologists to construct chronologies of human behavior and examine temporal changes through time at a finer scale than what had previously been possible.
The basin is tested for the mechanism of landforms preservation in high relief and abundant precipitation regimes of the Higher Himalaya.
Field geomorphology and remote sensing data, supported by Optical Stimulated Luminescence (OSL) dating enabled identification of five major glacial events of decreasing magnitude.
Radiocarbon dating is especially good for determining the age of sites occupied within the last 26,000 years or so (but has the potential for sites over 50,000), can be used on carbon-based materials (organic or inorganic), and can be accurate to within ±30-50 years.
Probably the most important factor to consider when using radiocarbon dating is if external factors, whether through artificial contamination, animal disturbance, or human negligence, contributed to any errors in the determinations.
The DGS-I glaciation (∼25–∼22 ka BP) occurred during early Marine Isotope Stage (MIS) −2, characterized as Last Glacial Maximum (LGM) extension of the valley.
Similarly, DGS-II stage (∼14–∼11 ka BP) represents the global cool and dry Older Dryas and Younger Dryas event glaciation.
The oldest glacial stage, Dokriani Glacial Stage I (DGS-I), extended down to ∼8 km (2883 m asl) from present-day snout (3965 m asl) followed by other four glaciations events viz.
DGS-II, DGS-III, DGS-IV and DGS-V terminating at ∼3211, 3445, 3648 and ∼3733 m asl respectively.
The DGS-III glaciation (∼8 ka BP) coincides with early Holocene 8.2 ka cooling event, the DGS-IV glaciations (∼4–3.7 ka BP) corresponds to 4.2 ka cool and drier event, DGS-V (∼2.7–∼1 ka BP) represents the cool and moist late Holocene glacial advancement of the valley.
This study suggests that the Dokriani Glacier valley responded to the global lowering of temperature and variable precipitation conditions.