What type of sand/rock is Malibu Beach made of and where did that sand originate??

I've been searching this for a while, but the only results I've gotten were for Beach Hotels.

Read this about the Geology:

GEOLOGY
Here where the Santa Monica Mountains meet
the Pacific Ocean, the coastline varies from
rocky bluffs to smooth sandy beaches.
Coastal development has interrupted natural
erosional and depositional cycles, as has the
construction of debris basins to prevent
landslides in the mountains. Therefore, sand
deposited on the beaches by the sea and
mountains is often supplemented by exotic,
trucked-in sand that originates in such urbanized
formations as the San Fernando Valley.

So the sand there may not be the original sand. What about contacting:
LA County Dept Beaches & Harbors @
beaches.co.la.ca.us/BandHMain.htm

Sra

Thank you SO much! This helped a lot!! Thank you!!!

its rocky

help me whit unscaunble words

To find out the type of sand/rock on Malibu Beach and where it originated, you can try the following steps:

1. Look for geological surveys or reports: Find scientific articles, research papers, or geological surveys conducted on the area. These sources often provide information about the composition of the beach.

2. Visit official websites: Check websites of local authorities, such as the Department of Natural Resources or environmental agencies in the area. They may provide information on the composition of the beach sediment.

3. Consult scientific databases: Explore online databases like the Geological Society of America's GeoRef or research platforms like Google Scholar. By searching for terms like "Malibu Beach sediment composition" or "geology of Malibu Beach," you may find relevant studies or articles.

4. Contact local universities or research institutions: Reach out to academic institutions in the region, particularly those with geology or earth science departments. Professors or researchers may have conducted studies on the subject or be able to point you in the right direction.

Unfortunately, as an AI, I don't have access to real-time data or the ability to browse the internet. However, by following these steps, you should be able to find credible sources that provide the information you are looking for.