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Builders soon found that the stones were useful for more than just jewelry. The sand and stones became components of streets, sidewalks and foundations. It is believed that 10,000 loads [vague] of the stones were crushed and used in the foundation of the Southern California Edison plant built in Redondo Beach in 1907. [3]
Exhibits include the crystalline gold Fricot Nugget, weighing 201 troy ounces (6.25 kg), the largest found during the California Gold Rush; a working scale model of a stamp mill over 100 years old, demonstrating the process of extracting gold from quartz rock; and a replica hard rock mine tunnel that allows visitors to better understand California's hard rock mines.
In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
The Mussel Rock formation itself is a sea stack of Cretaceous period greenstone, from the Franciscan Complex bedrock, dated 80 to 90 million years ago.Contrasted with the nearby 3 million year old sedimentary rocks of the Merced Formation, the metamorphosed marine basalt comprising the greenstone of the Mussel Rock Formation from the Franciscan complex is more resistant to erosive forces.
A family in San Carlos, California, is facing an impossible decision: spend more than $40,000 to remove a nearly 500-year-old heritage white oak tree in their backyard or find new homeowners ...
It generally dates to between 16 to 7 million years ago, but some sections are as early as 18 million years old or as young as 6 million years old. Most of the formation's sediments appear to represent siliceous shales deposited at the edge of the continental shelf or in abyssal plains in the lower to middle bathyal zone. These deep-sea ...
Researchers discovered a 500-year-old compass in a hidden chamber in Frombork, Poland, possibly used by Copernicus, shedding light on his astronomical work.
One of many old stone walls found around the southern and eastern San Francisco Bay in California, this one near San Jose. The East Bay Walls, also known as the Berkeley Mystery Walls, are a misnomer, as many such walls can be found throughout the hills surrounding the San Francisco Bay Area, and extend as far as Chico, Red Bluff and Montague.