Surface Plot and Intersection

Hey,

I have been struggling with this problem for a while now.

Please also see accompanying image: http://imageshack.us/photo/my-images/153/4wwq.jpg/

I have two line plots one on the (x,z) axis and one on the (y,x) axis. I want to plot both these line plots on a 3D plot and then extend them both into the 3rd dimension as shown in the image. This should create surfaces for both these plots. I then want to find the line of intersection between these two surfaces and have that plotted.

So far I have found out about the repmat command, but I can not make it work for my problem.

All help is greatly appreciated.