Earlier, fort wall had a thickness of 1.9 meters, which was raised to 3.7-4.1 meters during reconstruction in this phase.

Brick size was 20 × 20 × 10 cm in both construction-phases.

In this phase, the settlement was fortified, using dried mud bricks, from the beginning of occupation.

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Even today, similar ploughing is used for two simultaneous crops in this region, esp. For preservation, this excavated ploughed field area was refilled after excavation and the area was marked by concrete pillar posts. Fabric-A is carelessly potted in spite of use of potter's wheel.

The distinguishing mark of this early phase is pottery, characterized by six fabrics labelled A, B, C, D, E and F, which were later identified also at Sothi in North Western India. It contains designs in light-black, often decorated with white lines.

Kalibangan's excavation report was published in its entirety in 2003 by the Archaeological Survey of India, 34 years after the completion of excavations. Jain carried out excavations for 9 years (1960-9) in 9 successive excavation sessions.

The report concluded that Kalibangan was a major provincial capital of the Indus Valley Civilization. Two ancient mounds were excavated, spread over half kilometre (area quarter square kilometre).

It is the only Indus Valley Civilization site where there is no evidence to suggest the worship of the "mother goddess".

Within the fortified citadel complex, the southern half contained many (five or six) raised platforms of mud bricks, mutually separated by corridors. Vandalism of these platforms by brick robbers makes it difficult to reconstruct the original shape of structures above them but unmistakable remnants of oval fire-pits of burnt bricks for have been found, with a Pali Peedam or sacrificial post (cylindrical or with rectangular cross-section, sometimes bricks were laid upon each other to construct such a post) in the middle of each pit and sacrificial terracotta cakes in all these fire-pits.

Flowers, animals were painted in black on red background.

Fabric-D contained designs of slanted lines or semicircles in some, while most pots were plain. Fabric-C was distinguished by violet tinge and fine polish, with designs in black; it is the best proto-Harappan pottery in finishing. Among the other finds of this Period are: small blades of chalcedony and agate, sometimes serrated or backed; beads of steatite, shell, carnelian, terracotta and copper; bangles of copper, shell and terracotta; terracotta objects like a toy-cart, wheel and a broken bull; quem with mullers, a bone point, and copper celts, including an unusual axe, etc. Lal, former DG of ASI writes,"Kalibangan in Rajasthan ...

in Tehsil Pilibangān, between Suratgarh and Hanumangarh in Hanumangarh District, Rajasthan, India 205 km. It is also identified as being established in the triangle of land at the confluence of Drishadvati and Sarasvathi Rivers.