Tuesday, November 30, 2010

Remotely India # 1: A New Series On Indian Geology

I'm experimenting with a new series. The idea is to put up a satellite image of an interesting geological feature from India along with a brief explanation. I'm going into this without much preparation. I have about 5 locations ready but will have to actively look for more features to put up.

Which imaging service should I use? Google Maps and Bing Maps are the easily accessible choices,  but in honor of India's Remote Sensing Program which has been a credit to the country, wherever possible I will be putting up an image from an Indian Remote Sensing Satellite as well. I'm going to be using the public domain web mapping service Bhuvan as the source of the images taken from Indian satellites. The resolution allowed for unrestricted use of imagery via services like Bhuvan is a maximum of 5.8 meters, and so I will supplement that with an embeddable Google Maps frame for higher resolution images and a more interactive experience.

The inaugural image is a sentimental choice from my first solo mapping project in the Proterozoic Cuddapah Basin of Andhra Pradesh, south India, located between the towns of Kurnool and Nandyal.

Gani Kalva Anticline

Source: Resourcesat 1

The feature is an ENE plunging asymmetric anticline with spectacular dip slopes of quartz arenites making up the southern limb of the fold and left-lateral movement along a regional fault steepening the northern limb of the fold. There is some copper mineralization along the fault. The Cuddapah basin is an intra-cratonic basin which was filled up in several depositional mega cycles. Sections of two of these mega cycles are exposed in this area. The older mega cycle comprising the Cuddapah subgroup is exposed in the core of the anticline. An angular unconformity separates the older cycle from the younger Kurnool cycle (sub group) which is exposed along the limbs.


View Larger Map

Posting will be on Tuesday but maybe not every Tuesday! Suggestions and recommendations welcome..


  1. Good idea for a series. GeoPathology often uses text links to Flash Earth, which sometimes has better definition than Google Earth. That might be overkill as far as linking - but you could check it out.

  2. thanks Silver Fox.. Flash Earth is quite good. its high res imagery service for India is the same as Bing Maps i.e. Microsoft Virtual Earth...

    Google Maps though is embeddable in Blogger which makes for a more enjoyable user experience than just linking..