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Native Americans
By the time European adventurers arrived in the 15th century A.D., scholars estimate that more than 50 million Native Americans were already living in the Americas -
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Mexican American War
began April 25, 1846, As soon as Texas received independence from the Mexican Government in 1836, it was annexed by the American Government. One major reason for annexation was the large presence of American immigrants in Texas. The Mexican-American War was a defining moment in the relationship between Mexico and the USA. Tensions had been high between the two since 1836, when Texas broke off from Mexico and began petitioning the USA for statehood. -
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San Francisco
In 1848, San Francisco grow from a farming community to a thriving metropolis.
December 5, 1848 – President Polk Catalyzes the California Gold Rush. On this day in history, President James K. Polk, in his State of the Union address, proclaimed: It was known that mines of the precious metals existed to a considerable extent in California at the time of its acquisition [1848]. -
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Compromise of 1850
The Gold Rush begin to fade out in 1855. -
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Treaty of Guadulupe Hidalgo
The Treaty of Guadalupe Hidalgo was a controversial treaty that ended the Mexican-American War. -
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“Forty-Niners”
he people who left their homes in search of gold were later referred to as the "forty-niners," simply because the year was 1849.
California admission to the Union years was 1850.
California was quickly granted statehood in 1850, and the California Gold Rush brought a flood of treasure seekers With their sourdough bread in tow prospectors accumulated in San Francisco over rival Benicia, raising the population from 1,000 in 1848 to 25,000 by December 1849. -
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Levi Strauss
Levi Strauss was the one who founded the first company to manufacture blue jeans. -
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Hydraulic mining
Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment.
Environmental issues that are specifically related to hydraulic fracturing include: water availability; spills of chemicals at the surface; impacts of sand mining for use in the hydraulic fracturing process; surface water quality degradation from waste fluid disposal; groundwater quality degradation.
Hydraulic mining was outlawed in 1884