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)
Sajan sarthak
Olivine and clinipyroxene both can form so their concentration is decreasing in magma.
so according to you basically it means that both MgO and CaO are decreasing in content due to the formation of olivines and pyroxenes... and Al2O3 is increasing in content. .. If the question would have been asked that the slope of CaO is not negative instead positive then the answer would have been olivine crystallization along with plagioclase crystallisation... am I right? .. and what exactly is the meaning of suite of "congenetic and coeval" given in the question?
only olivine
PLAGIOCLASE will form if Cao and Al2O3 both are decreasing
co genetic:- same parent. coeval :+ same time
oh okay.... thank you so much :)