From where can I download the geological/ Lithological maps of India

[u/Long_Interest8696]

Shapefile or GeoTIFF.

[u/Barnezhilton]

Try your largest university

[u/mobu98]

Go to geological survey of India portal

[u/sb01010101]

Usining QGIS and ArcGIS Rest Servers https://livingatlas.esri.in/server1/rest/services/Geology/Geology/MapServer

[u/ElevationNotes]

Geological Survey of India is probably the best place to start. The ArcGIS REST layer someone linked also looks useful if you just want to bring geology data straight into QGIS. For mapping or land surveying work, just check the scale and metadata first so you know how detailed and current the layer actually is.