Final answer:
The state that experienced a major gold rush in 1848 was California.
Step-by-step explanation:
In 1848, the state that experienced a major gold rush was California. The gold rush in California began when gold was discovered at Sutter's Mill, leading to a large influx of people seeking riches in the area. This event had a significant impact on the development and population of California, as many people from different parts of the world migrated there in search of gold.
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