Eris is one of the dwarf planet. Hm so originally eris was inside the kuiper belt but due to interactions with neptune and other planets it started forming outside the scatters disk region.
These are in order from top to bottom. ohio, Mississippi, Atlanta, Atlantic, Washington DC, mexico
Intrusive igneous rock/ volcanic rock is formed
When magma penentrate through the layers of bedding plane,it cools down gradually and form intrusive igneous rock such as granite.
hope it helps!