Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Saurabh 1
Cooling joints are common in basaltic flow or les viscous flow. These are columnar joint resulting from the cooling of lava exposed on the surface generally basaltic. You can see best columnar joints in basalts at Giants Causeway... Here I'm attaching a figure of that spectacular formations.