Possible Clues:

• Processed last of garlic oils in this Californian valley
• By the sound of it, that silly boy is a chip of the old block
• Chip element
• Element used in making electronic chips
• Element distributed in soil, buried carbon
• More than a quarter of the earth's crust, by mass
• Valley known for computer chips
• Sounds as if stupid Cornelius may get a chip of it
• Element found in chips?
• -- Valley in California