How to combine multiple overlapping polygon shapefiles into 1 - retain top most layer

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Working with ArcGIS 10.2...

I'm looking at geological data and have 4 separate polygon shapefiles. They all fall ontop of one another like a stack.

I need to create a single dataset from the four separate shapefiles that only has the visual geology from the display order. I do not need to include information of additional overlapping features that fall underneath a feature.

I've tried to merge, union, append, update. But I don't think it happening in the correct order.





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