Answer:
1. Calcium Plagioclases
2. Olivine
Step-by-step explanation:
Research has shown that all minerals do not form from magma at the same time and temperature. This process of magma crystallization is often referred to as Reaction Series, whereby magma crystallizes one or two minerals at the same time (at high temperatures) and consequently, some of these minerals may form reactions or mixed with the magma to create new minerals at lower temperatures.
In the Norman Bowen Reaction series, Calcium Plagioclases and Olivine are the first minerals to crystallize in igneous rock. They crystallize at 1100 degrees Celcius.