Summarizing/Copying dynamic ranges of data to new sheet?

OK, I'm not sure how to ask this question...

How do I summarize dynamic ranges of data to a new sheet?

For example on sheet1 I might have...

     A     B     C
1    x     x     x
2    x     x     x
3    x     x     x

and on sheet2 I might have...

     A     B     C
1    o     o     o
2    o     o     o
3    o     o     o

and these ranges are dynamic, meaning they could be more or less rows (columns are static)

I would like to have a summary sheet showing the 2 ranges combined sequentially like so...

     A     B     C
1    x     x     x
2    x     x     x
3    x     x     x
4    o     o     o
5    o     o     o
6    o     o     o

is there any way to do this?

I have searched online, but haven't found an answer, mainly because I'm not sure exactly how to phrase my search.

Any help would be greatly appreciated!