I have two arrays, both of which are two-dimensional (for example,
Array1(100,5) and Array2(300,5), of the same type (Variant). I want to
combine them into a single array, and then I want to consolidate any
duplicate elements. Any ideas on the best way to do this?

In the past, I've handled this by just dumping the data from the arrays onto
a blank worksheet, sorting the data there, and then doing a search loop that
consolidates the duplicate elements. I'm thinking there might be a way to do
it entirely within arrays, off the worksheet.