Preheat oven to 375°F.
Brown ground beef in a large skillet over medium heat, breaking it into small crumbles as it cooks. Drain off any excess fat.
Stir in Cuumin and the can of diced green chilies.
Add the salsa to the skillet and stir to combine.
Add the red enchilada sauce to the skillet and stir to combine. Remove from heat.
Place slightly crushed tortilla chips in a large mixing bowl.
Add the beef mixture to the tortilla chips in the mixing bowl.
Add half the shredded Cheddar and Jack cheeses to the bowl.
Stir to combine all the ingredients and completely coat the tortilla chips with the sauce, meat and cheese mixture.
Grease a 13 X 9 inch casserole dish with non-stick cooking spray.
Transfer the meat/tortilla chip/cheese filling into the prepared casserole dish and smooth out the filling into an even layer.
Top with a layer of the remaining cheeses.
Sprinkle evenly with sliced black olives.
Cover the casserole dish with foil.
Bake for 50 minutes. Remove foil and set oven temperature to "broil".
Broil until cheese is melted and bubbly and just barely beginning to brown along the edges.
To serve, top each serving with a dollop of sour cream.