Memoirs of the Geological Survey of India: Indian Geological Terminology

The concept of reprinting some of the earliest Memoirs and Records of GSI as early as 1859 and 1868 till the first few decades of the twentieth Century, crystallized with the sesquicentennial celebration year of the Geological Survey of India. [...] It was only after leaving the service that I found time suffi- cient to undertake the necessary mechanical work of piecing to- gether the notes, of summarising the extracts from literature, of checking the co-ordinates of the localities quoted, and of reducing the entries to some approach to that uniformity which is neces- sary to make a work of reference of practical value. [...] He gave an account of the nature and general distribution of the funda- mental crystallito rocks, of the overlying sheets of basaltic lava (now generally known as the Deccan Trap), and of the coal-measures (now Gondwanas) in the Damuda valley. [...] Evidently due to the mistake of Carter, the diamond sandstone of Golconda," other beds of the Kurnools and Cuddapahs, as well as the Gondwanas of the Central Provinces were regarded as Oolitic in age. [...] The same idea is applied to the boundary between the Palaeozoic and Mesozoic in the Salt Range and the Himalaya against the evidence of geologists such as Wynne, Waagen, Noetling, Krafft, Diener, Griesbach, and Koken, who have studied the rocks closely in the field and have also worked out the palaeontology in detail.