Split Rock (Wyoming) facts for kids
Quick facts for kids |
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Split Rock, Twin Peaks
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 Location in Wyoming
Location in the United States
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| Nearest city | Muddy Gap, Wyoming |
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| Area | less than one acre |
| NRHP reference No. | 76001959 |
| Added to NRHP | December 22, 1976 |
Split Rock, also known as Twin Peaks, is a special mountain in the Granite Mountains in central Wyoming. It stands tall at about 7,305 feet (2,226 meters) high. You can find it about 10 miles (16 km) north of a place called Muddy Gap. This spot is between the cities of Casper and Rawlins.
What makes Split Rock unique is a deep, V-shaped cut right at its top. This makes it look like two peaks, which is why it's also called Twin Peaks. For many years, this mountain was a very important landmark. It helped people find their way on famous paths like the Oregon Trail. These early routes helped settlers travel across the region.
In 1976, Split Rock was added to the National Register of Historic Places. This means it's recognized as an important historical site.
Contents
How Split Rock Was Formed
The Beginning of the Mountains
About 50 million years ago, the land where Split Rock is today started to change. The Sweetwater River Valley and the Granite Mountains began to form. These mountains were part of the huge Rocky Mountains chain.
The Land Sinks and Fills
Then, about 15 million years ago, the ground in this area dropped down. This created a large, bowl-shaped space. Over time, rain and wind wore down the surrounding high lands. This material filled the bowl with about 3,000 feet (914 meters) of dirt and rocks.
Moonstone Lake Appears
Around 10 million years ago, a big, shallow, salty lake formed in this area. It was called 'Moonstone Lake'. This lake added another 1,500 feet (457 meters) of new layers of sediment. Some of these layers even had small amounts of uranium. As the land kept sinking, the erosion continued. This process eventually uncovered the hard rock of the Granite Mountains, including Split Rock.
The Continental Divide Connection
The Continental Divide is a line that separates which way water flows across North America. Here, it follows the southern edge of this basin. It includes the Wind River Range and extends east through other mountains like the Ferris Mountains and Green Mountains. There are a few natural breaks in these mountains, like Muddy Gap and South Pass.
This long valley is like a natural ramp. It was built up from the sands of the ancient Moonstone Lake. The Sweetwater River flows through the eastern part of this basin. It's a clear mountain stream with gentle slopes, fresh water, and lots of grass. These features made it a perfect path for travelers.
Split Rock's History as a Landmark
A Major Route Through the Mountains
The Sweetwater River Valley is a natural break in the Rocky Mountain chain. This made it a very important east-west route for people traveling across the country. Many different groups used this path.
- Fur Trappers: Early explorers and trappers, like those from the American Fur Company, used this route.
- Gold Seekers: People hoping to find gold during the California Gold Rush traveled here.
- Homeseekers: Families looking for new land to settle used this path.
- Merchants and Soldiers: Traders and military groups also used this route.
People traveled in many ways, including on horseback, in wagons, walking, or pushing handcarts. This happened from 1812 all the way to 1912.
Famous Trails Passed By
The journey began with the Astorians in 1812. They were led by Robert Stuart and were trying to find a way to the mouth of the Columbia River for furs. Over the years, parts of this route became famous trails:
- The California Trail
- The Oregon Trail
- The Mormon Pioneer Trail
Even before 1812, parts of this trail were used by American Indians. They followed herds of buffalo and other animals that moved across the plains. By 1912, new ways of travel like railroads, then the automobile, and later airplanes replaced the old wagon trails.
