Are There Any Mountains on the Mining Worlds?

I have searched high and low on both servers with no luck :-(
Where are any emeralds? I only need a few, but none to be found so far.
Thanks in advance.

 

Thank you so very much! I will check it out.

 

I am just trying to find some in the mining world to have a few in my shop.

 

Thank you! I thought I read somewhere they are only found in mtn biomes. Also, a graph I have seen shows them to be easier found at 144 to 248.
I guess it means I just need to spend more time mining, and stop being a slacker