The San Juan Mountains is a high and rugged mountain range in the Rocky Mountains in southwestern Colorado and northwestern New Mexico. The area is highly mineralized and figured in the gold and silver mining industry of early Colorado. Major towns, all old mining camps, include Creede, Lake City, Silverton, Ouray, and Telluride. Large scale mining has ended in the region, although independent prospectors still work claims throughout the range. The last large-scale mines were the Sunnyside Mine near Silverton, which operated until late in the 20th century, and the Idarado Mine on Red Mountain Pass, which closed in the 1970s. Famous old San Juan mines include the Camp Bird and Smuggler Union mines, both located between Telluride and Ouray.
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous. Tuff composed of sandy volcanic material can be referred to as volcanic sandstone.
Cripple Creek is a statutory city that is the county seat of Teller County, Colorado, United States. The city population was 1,155 at the 2020 United States Census. Cripple Creek is a former gold mining camp located 20 miles (32 km) southwest of Colorado Springs near the base of Pikes Peak. The Cripple Creek Historic District, which received National Historic Landmark status in 1961, includes part or all of the city and the surrounding area. The city is now a part of the Colorado Springs, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
The Never Summer Mountains are a mountain range in the Rocky Mountains in north central Colorado in the United States consisting of over twenty named peaks. The range is located along the northwest border of Rocky Mountain National Park, forming an S-turn in the continental divide between the headwaters of the Colorado River in Rocky Mountain National Park and the upper basin of the North Platte River. The range is small and tall, covering only 25 sq mi (65 km2) with a north–south length of 10 mi (16 km) with over ten distinct peaks rising more than 12,000 ft (3,700 m). The range straddles the Jackson-Grand county line for most of its length, and stretches into Jackson and Larimer county at its northern end. A panoramic view of the range is available from sections of Trail Ridge Road in Rocky Mountain National Park. One of the northernmost peaks, Nokhu Crags, is prominently visible from the west side of Cameron Pass.
Clough Head is a fell, or hill, in the English Lake District. It marks the northern end of the main ridge of the Helvellyn range and is often walked as part of the ridge walk. The fell stands south of the village of Threlkeld and the A66 road, and it forms the steep eastern side of the tranquil valley of St John's in the Vale.
La Garita Caldera is a large caldera in the San Juan volcanic field in the San Juan Mountains around the town of Creede in southwestern Colorado, United States. It is west of La Garita, Colorado. The eruption that created the La Garita Caldera is among the largest known volcanic eruptions in Earth's history, as well as being one of the most powerful known supervolcanic events.
The West Elk Mountains are a high mountain range in the west-central part of the U.S. state of Colorado. They lie primarily within the Gunnison National Forest, and part of the range is protected as the West Elk Wilderness. The range is primarily located in Gunnison County, with small parts in eastern Delta and Montrose counties.
South Table Mountain is a mesa on the eastern flank of the Front Range of the Rocky Mountains of North America. Castle Rock, the 6,338-foot (1,932 m) summit of the mesa, is located on private property in Jefferson County, Colorado, 0.56 miles (0.9 km) directly east of downtown Golden.
Gold mining in Colorado, a state of the United States, has been an industry since 1858. It also played a key role in the establishment of the state of Colorado.
Silver mining in Colorado has taken place since the 1860s. In the past, Colorado called itself the Silver State.
Dinosaur Ridge is a segment of the Dakota Hogback in the Morrison Fossil Area National Natural Landmark located in Jefferson County, Colorado, near the town of Morrison and just west of Denver.
The San Juan volcanic field is part of the San Juan Mountains in southwestern Colorado. It consists mainly of volcanic rocks that form the largest remnant of a major composite volcanic field that covered most of the southern Rocky Mountains in the Middle Tertiary geologic time. There are approximately fifteen calderas known in the San Juan Volcanic Fields; however, it is possible that there are two or even three more in the region.
Treasure Mountain, elevation 13,535 ft (4,125 m), is a summit in the Elk Mountains of western Colorado. The mountain is in the Raggeds Wilderness southeast of Marble. The massif has been the site of marble mining and a legend of lost French gold.
The Front Range Urban Corridor is an oblong region of urban population located along the eastern face of the Southern Rocky Mountains, encompassing 18 counties in the US states of Colorado and Wyoming. The corridor derives its name from the Front Range, the mountain range that defines the western boundary of the corridor which serves as a gateway to the Rocky Mountains. The region comprises the northern portion of the Southern Rocky Mountain Front geographic area, which in turn comprises the southern portion of the Rocky Mountain Front geographic area of Canada and the United States. The Front Range Urban Corridor had a population of 5,055,344 at the 2020 Census, an increase of +16.65% since the 2010 Census.
Pikeview is a neighborhood of Colorado Springs, annexed to the city as the "Pike View Addition" on August 1, 1962. In 1896 there was a Denver and Rio Grande Western Railroad station in Pikeview, and miners had begun digging a shaft for the Pikeview Coal Mine. Pikeview also had a quarry beginning 1905 for the mining of limestone for concrete. Coal mining ended in 1957, but the Pikeview Quarry continues to operate. Quarry operations, though, have created a gash or scar in the landscape and efforts have been made since the late 1980s to reclaim the hillside landscape. The Greg Francis Bighorn Sheep Habitat in what had been Queens Canyon Quarry was founded in 2003 in recognition of the individuals and organizations that have worked to create a nature hillside habitat.
Colorado mining history is a chronology of precious metal mining, fuel extraction, building material quarrying, and rare earth mining.
In the mid-19th century, Colorado Springs was a center of mining industry activity. Coal was mined in 50 mines in the area and towns, now annexed to Colorado Springs, were established to support residents of the coal mining industry.
The geology of New Mexico includes bedrock exposures of four physiographic provinces, with ages ranging from almost 1800 million years (Ma) to nearly the present day. Here the Great Plains, southern Rocky Mountains, Colorado Plateau, and Basin and Range Provinces meet, giving the state great geologic diversity.
Tomichi Pass is a high mountain pass in the Sawatch Range of the Rocky Mountains of Colorado. It is located in Gunnison County and in the Gunnison National Forest. The pass divides the watersheds of Middle Quartz Creek to the north and Tomichi Creek to the south.
