Igneous Suite is the largest in India and third largest igneous suit in the world. The uniqueness of the geological feature of Malani Igneous Suite at Jodhpur prompted the Geological Survey of India to declare the site as a National Geological Monument. Tectonic-stratigraphic evolution Tectonic-stratigraphic evolution of the Aravalli Range: Neoproterozoic: Marwar Group 500–550 Ma: Malani Igneous Suite 720–750 Ma: Sindhrath/Punagarh Group 800–850 Ma: Sirohi Group 900 Ma: Erinpura granite Mesoproterozoic: Delhi Supergroup 1100–900 Ma: South Delhi fold belt 1600–1450 Ma: North Delhi fold belt Paleoproterozoic: Hindoli Group 1800–1700 Ma: Sandmata Complex 2200–1800 Ma: Aravalli Supergroup and mineralised basin at Rajpura-Dariba Neoarchean (2900–2600 Ma): Mangalwar Complex with Bhilwara Group Mesoarchean (3300–3000 Ma): Mewar gneiss with Jagat Supergroup Stratigraphic classification The stratigraphic classification of the Aravalli Range can be divided into the following parts (north to south direction): The Archean basement is a banded gneissic complex with schists (medium grade metamorphic rock), gneisses (high grade regional metamorphic rock), composite gneiss and quartzites. It forms the basement rock for both the Delhi Supergroup and the Aravalli Supergroup. Aravalli Supergroup: The Aravalli supergroup passes through Rajasthan state, dividing it into two halves, with three-fifths of Rajasthan on the western side towards the Thar Desert and two-thirds on the eastern side consisting of the catchment area of Banas and Chambal rivers bordering the state of Madhya Pradesh. Guru Shikhar, the highest peak in the Aravalli Range at in Mount Abu of Rajasthan, lies near the south-western extremity of the Central Aravalli range, close to the border with Gujarat state. The southern Aravalli Supergroup enters the northeast of Gujarat near Modasa where it lends its name to the Aravalli district, and ends at the centre of the state at Palanpur near Ahmedabad. Champaner Group is a rectangular outcrop composed of subgreywacke, siliceous phyllite, pelitic schist, quartzite and pertomict conglomerate. Lunavada Group is a polygon area in the south of the Aravali Orogen composed of greywacke-phyllite Jharol Group is spread over 200 km2 area with average width of 40 km carbonate-free phyllite and arenite with turbidite facies and argillaceous rocks. Udaipur Group is a thick accumulation of greywacke-phyllite basement overlain by dolomite. Debari Group consists of Carbonates, Quartzite, and Pelitic rocks which are overlain by the Delwara group. Delwara Group is spread over a 500 km2 area with average thickness of 500 m and includes basement orthoquartzite overlain by volcanic conglomerate. Unconformities Mangalwar/Sandmata Complex and Mewar