Why is it called 7 layer dip?

Why is it called 7 layer dip? WHY IS IT CALLED 7 LAYER DIP? Mainly it is called this because it literally contains 7 different layers. This is an American appetizer based on ingredients typical of Tex-Mex food. The first widely published recipe called it Tex-Mex Dip.

WHY IS IT CALLED 7 LAYER DIP? Mainly it is called this because it literally contains 7 different layers. This is an American appetizer based on ingredients typical of Tex-Mex food. The first widely published recipe called it Tex-Mex Dip.