Wow! Fantastic photos and a good clear demonstration of these various types.

clipped from listverse.com 10 Rare Cloud Formations clipped from listverse.com 1. Nacreous Clouds 2. Mammatus Clouds 3. Altocumulus Castelanus 4. Noctilucent Clouds 5. Mushroom Clouds 6. Cirrus Kelvin-Helmholtz 7. Lenticular Clouds 8. Roll Clouds 9. Shelf Clouds 10. Stratocumulus Clouds