For something different, but still Mulholland-related:
Dave and I went mountain biking last weekend off Dirt Mul. Instead of going towards the Nike missile base in Encino, we headed parallel to the 405, over towards Mandeville Cyn. Dave noted a fossil embedded in a rock. We searched around for about 10 minutes and found another half-dozen. I brought a few back in my Camelbak as my kids are studying geology in their science class this semester.
Imagine that. Fossils of seashells at the top of a mountain range. What is now sitting at around an elevation of 1700' was once seabed.