Archaeological periodization commonly places the shift from the Mature Harappan urban phase to a transitional/Late Harappan horizon around 1900 BCE, marking the start of pronounced regional differentiation and the decline of shared urban institutions.
In many regions after about 1900 BCE, hallmark Indus urban features—especially inscribed seals, standardized weights, and widespread use of the script—largely disappear from the archaeological record, signaling major institutional change rather than a single sudden end.
The Punjab Phase of the Localization (Late Harappan) era includes the Cemetery H horizon at Harappa and related sites, representing one pathway of post-urban cultural development in the greater Indus tradition.
The Cemetery H culture—named for burials excavated in “Area H” at Harappa—is widely dated to roughly 1900–1300 BCE and is generally treated as a regional expression of the Late Harappan/Post-Urban period in the Punjab.
In Sindh (lower Indus), the Jhukar cultural phase is commonly used to denote a post-urban (Late Harappan) regional tradition following Mature Harappan city decline, broadly contemporary with other Localization-era regional cultures.
Rather than a uniform collapse, the post-urban transformation after ~1900 BCE is often described as regionally varied, with local trajectories in the Upper Indus, Lower Indus, Gujarat, and adjacent areas; exchange networks also persisted in modified forms.
In Kachchh–Saurashtra–Gujarat, Late Harappan developments include many small settlements rather than large cities; this pattern is often cited as part of the broader shift toward more localized, rural settlement networks.
Scholarly explanations increasingly emphasize hydroclimatic change (monsoon weakening, river-flow variability, shifting fluvial landscapes) as an important driver of Indus deurbanization and eastward/regionward settlement reorganization during the 2nd millennium BCE.
Cemetery H is noted for distinctive burial practices including pot/urn burials that overlie earlier Harappan deposits at Harappa, reflecting changing mortuary traditions in the Late Harappan period.
At Harappa, excavators distinguish a transitional phase (Period 4) from a fully developed Late Harappan/Cemetery H phase (Period 5), helping anchor Late Harappan regionalization in a well-stratified urban-center sequence.
At Bhagwanpura (Haryana), published excavation phasing reports a Late Harappan sub-period (c. 1700–1300 BCE) followed by an overlap horizon where Late Harappan and Painted Grey Ware (PGW) materials co-occur, illustrating cultural transitions on the eastern periphery.
By about 1300 BCE, the Cemetery H horizon is generally considered to have ended, with subsequent regional cultural developments (including early Iron Age trajectories in parts of north India) becoming more archaeologically prominent.
Michael CarricoLate Harappan Regionalization and Cemetery H Cultures (c. 1900–1300 BCE)