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When Carlos brings a mystery rock to school, he hopes Ms. Frizzle will tell him what kind of rock it is. But the Friz doesn't like to tell when she can show....That's how the class ends up on a wild rock hunt in the Wild West, trying to solve a mineral mystery! They take a stagecoach ride,... read more

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This is book 20 of 35 in Magic School Bus - Science Chapter Books. (publisher series)

Preceded by Color Day Relay.

Authors & Contributors edit see section history

  1. Judith Bauer Stamper (Author)
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  1. chapter book
  2. erosion
  3. magic school bus
  4. rocks 

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