Where can I find clay soil around LA? I need clay soil for a science project, but i cant come...

I need clay soil for a science project, but i cant come across to find it anywhere. Ive tried nursery homes, and home depot. Does anybody know. Please tell me.
How long should I sign out the soaker...
Most brick places carry fire brick clay. Look them up on http://www.yellowpages.com for your nouns.

Clematis newly will not grow?
Glen Ivy Hot Springs have Red Clay. (888) CLUB-MUD.
They are located at:
25000 Glen Ivy Road
Corona, CA
Strawberry "hold?"?
Answers:    Culver City and Venice hold clay soil. Out in the San Gabriel vale, we have sandy soil. If you want some clay soil drive around the Carlson Park neighborhood of Culver City on a weekend and ask a nice looking soul for some of their dirt! I guarantee you it is hard as a rock.