Spread the bean dip on large platter.Mash 2 avocados with seasonings and spread on top of bean dip.
Thoroughly mix sour cream with mayonnaise and taco seasoning,
spread this on top of avocado mixture.
Add shredded cheddar cheese on top of sour cream mixture.
Add shredded jack cheese on top of cheddar cheese.
Top with ripe olive slices and green onions.
Serve with tortilla chips.