I don't get it... How do Ammonite fossils in the Himilayans disprove evolution? Surely, you do realize that when the Amonites were plentiful, according to scientists, the Himilayan mountains did not exist yet. That was about 500 million years ago. Much more recently (I forget exactly when), India supposedly crashed into Asia, resulting in the relatively brand-new mountain range rising up, lifting sedimentary rocks formed on the ocean floor to heights over 25000 feet.
On the other hand, I'm not sure how biblical literalists explain fossilized sea creatures 29,000 feet up.
Oh, and you do realize that the Sahara was recently quite moist, don't you?
The Flood put them there, of course. ;)