Note From Coordinator

The online Atlas strives to bring together the petrographic features from different branches of Geology. It has, at present, been divided into eleven chapters. Each chapter consists of (i) a short write-up to jog the memory and refresh the basic petrographic knowledge of our readers and (ii) a large collection of microphotos, each with proper caption as illustrative examples. Every single photo has been acknowledged as the work represents the contributions of a wide range of geoscientists. Alongside the microphotos, we have also used a few field photographs as examples of textures that cannot be studied in the scale of a petrographic section. For example, a conglomerate or a megacrystic granite is impossible to represent in a single section. To do justice to such textures, we had to include certain field photographs. But the number is limited and our collection focuses on microscopic features generally. The write-ups in each chapter outline the basic petrographic varieties without going into the details of mechanisms of their development or complex issues of interpretations. In time we endeavor to add chapters on advanced petrographic techniques including SEM, CL, BSE, FCC and TEM to our collection. The material will be uploaded phase wise and will be added to in the coming months and years. We, from Geological Survey of India, sincerely hope that the huge collection of textures will be of help to young and enthusiast readers/ field scientists/ students/ researchers as well as to their trainers as a ready material for consultation and comparison. The photos are meant for learning only and are not to be downloaded or reproduced without prior approval of concerned scientists.

Our work is still in progress. Any enquiry or discussion regarding the material is welcome. Please write to gsirktexatlas@gmail.com for any such enquiry.

PARTICIPANTS……in compilation of the Rock Texture Atlas of GSI

1. Dr. Kasturi Chakraborty, Director and Editor, Rock Texture Atlas of GSI
2. Dr. Bashab Nandan Mahanta, Director
3. Shri Sabyasachi Dutta, Director
4. Dr. Arindam Dutta, Senior Geologist
5. Dr. Trisrota Chowdhury, Senior Geologist
6. Smt. Susmita Mondol, Senior Geologist
7. Dr. Omnath Saha, Senior Geologist
8. Shri. Debapriya Adhikari, Senior Geologist
9. Smt. Shalini Saroj, Geologist
10. Smt. Gargi Sharma, Geologist
11. Ms. Sayoni Mitra, Assistant Geologist