Hello,

CSIR NET is conducted mainly for mathematical science, chemical science, physical science, earth science, life science and the eligibility criteria is passed master's degree in the relevant discipline from a recognized university with 55% aggregate, in case of reserved categories there is relaxation of 5%,  if you want to pursue higher education such as PhD you should appear for CSIR NET, there is Junior Research Fellowship for which is candidate qualify get stipend of Rs 31,000 for first two years, and later if they get promoted to SRF receive Rs 35,000 stipend on a monthly basis, and there is also Assistant Professor so if you qualify CSIR NET it opens up opportunities in terms of teaching in university level, of course simply qualifying CSIR NET doesn't guarantee a job, you need to build your profile in terms of teaching experience, research and other academic contributions, and even PSUs or various other companies recruit CSIR JRF candidates, so you have that option as well, as you have done MSc in Geology you can go for Earth Science in CSIR NET, this exam is conducted two times a year, to know more details consider going through previous year official notification at https://csirnet.nta.nic.in/webinfo/File/GetFile?FileId=32&LangId=P