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Pluto's Cave
Pluto's Cave (or Pluto Cave) is a partially collapsed lava tube on the northern outskirts of Mount Shasta in the Klamath National Forest. Its main entrance is located close to the 99-97 Cutoff North-east of Weed and East-southeast of Grenada. The tube is roughly 190,000 years old, which is quite old for a lava tube, as they normally collapse quickly (in geological terms), having ceilings only a few metres thick. However, Pluto's Cave is located in a semi-arid climate, where erosion is restricted, which contributes to its survival. The cave was discovered in the spring of 1863 by Nelson Cash, who came upon it while looking for stray cattle. It was further explored in April 1863, and named "Pluto's Cave" after Pluto, the Greek God of the underworld. William Henry Brewer assisted by Clarence King on a field trip for the California Division of Mines and Geology (predecessor of today's California Geological Survey), visited the cave on October 10, 1863. Brewer writes about it a mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klamath National Forest
Klamath National Forest is a national forest, in the Klamath Mountains and Cascade Range, located in Siskiyou County in northern California, but with a tiny extension (1.5 percent of the forest) into southern Jackson County in Oregon. The forest contains continuous stands of ponderosa pine, Jeffrey pine, Douglas fir, red fir, white fir, lodgepole pine, Baker Cypress (Cupressus bakeri), and incense cedar. Old growth forest is estimated to cover some of the forest land. Forest headquarters are located in Yreka, California. There are local ranger district offices located in Fort Jones, Happy Camp, and Macdoel, all in California. The Klamath was established on May 6, 1905. This forest includes the Kangaroo Lake and the Sawyers Bar Catholic Church is located within the boundaries of the Forest. The Forest is managed jointly with the Butte Valley National Grassland. Wilderness areas There are four officially designated wilderness areas in Klamath National Forest that are part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarence King
Clarence Rivers King (January 6, 1842 – December 24, 1901) was an American geologist, mountaineer and author. He was the first director of the United States Geological Survey from 1879 to 1881. Nominated by Republican President Rutherford B. Hayes, King was noted for his exploration of the Sierra Nevada mountain range. Early life and education Clarence King was the son of James Rivers King and Florence Little King. Clarence's father was part of a family firm engaged in trade with China, which kept him away from home a great deal, and he died in 1848, so Clarence was brought up primarily by his mother. By 1848, his only two siblings had also died. Clarence developed an early interest in outdoor exploration and natural history, which was encouraged by his mother and by Reverend Dr. Roswell Park, head of the Christ Church Hall school in Pomfret, Connecticut, that Clarence attended until he was ten. He then attended schools in Boston and New Haven and, at age thirteen, was accepted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of California
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. Caves which extend further underground than the opening is wide are called ''endogene'' caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as '' speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorgan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Tubes
A lava tube, or pyroduct, is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave. Formation A lava tube is a type of lava cave formed when a low-viscosity lava flow develops a continuous and hard crust, which thickens and forms a roof above the still-flowing lava stream. Tubes form in one of two ways: either by the crusting over of lava channels, or from pāhoehoe flows where the lava is moving under the surface. Lava usually leaves the point of eruption in channels. These channels tend to stay very hot as their surroundings cool. This means they slowly develop walls around them as the surrounding lava cools and/or as the channel melts its way deeper. These channels can get deep enough to crust over, forming an insulating tube that keeps the lava molten and serves as a conduit for the flowing lava. These types of lava tubes tend to be closer to the lava er ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-Columbian
In the history of the Americas, the pre-Columbian era spans from the original settlement of North and South America in the Upper Paleolithic period through European colonization, which began with Christopher Columbus's voyage of 1492. Usually, the era covers the history of Indigenous cultures until significant influence by Europeans. This may have occurred decades or even centuries after Columbus for certain cultures. Many pre-Columbian civilizations were marked by permanent settlements, cities, agriculture, civic and monumental architecture, major earthworks, and complex societal hierarchies. Some of these civilizations had long faded by the time of the first permanent European colonies (c. late 16th–early 17th centuries), and are known only through archaeological investigations and oral history. Other civilizations were contemporary with the colonial period and were described in European historical accounts of the time. A few, such as the Maya civilization, had their own ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Muir
John Muir ( ; April 21, 1838December 24, 1914), also known as "John of the Mountains" and "Father of the National Parks", was an influential Scottish-American naturalist, author, environmental philosopher, botanist, zoologist, glaciologist, and early advocate for the preservation of wilderness in the United States of America. His letters, essays, and books describing his adventures in nature, especially in the Sierra Nevada, have been read by millions. His activism helped to preserve the Yosemite Valley and Sequoia National Park, and his example has served as an inspiration for the preservation of many other wilderness areas. The Sierra Club, which he co-founded, is a prominent American conservation organization. In his later life, Muir devoted most of his time to the preservation of the Western forests. As part of the campaign to make Yosemite a national park, Muir published two landmark articles on wilderness preservation in '' The Century Magazine'', "The Treasures o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Exploration Of The Fortieth Parallel
The Geological Exploration of the Fortieth Parallel was a geological survey made by order of the Secretary of War according to acts of Congress of March 2, 1867, and March 3, 1869, under the direction of Brig. and Bvt. Major General A. A. Humphreys, Chief of Engineers, by Clarence King, U. S. geologist. More commonly known as the Fortieth Parallel Survey, the survey conducted field work from 1867 to 1872, exploring the area along the fortieth parallel north from northeastern California, through Nevada, to eastern Wyoming. Results The results of the survey were published in eight volumes of the Fortieth Parallel Survey: Vol. I. Systematic geology by Clarence King, U. S. Geologist. 1878. xii, 803 pp., and atlas of 12 sheets. Vol. II. Descriptive geology by Arnold Hague and S. F. Emmons. 1877. xiii, 890 pp. Vol. III. Mining industry by James Duncan Hague, with geological contributions by Clarence King. 1870. xv, 647 pp. and atlas of 14 sheets. Vol. IV Part I, Palaeontology. by F. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamois
The chamois (''Rupicapra rupicapra'') or Alpine chamois is a species of Caprinae, goat-antelope native to mountains in Europe, from west to east, including the Alps, the Dinarides, the Tatra Mountains, Tatra and the Carpathian Mountains, the Balkan Mountains, the Rila–Rhodope Mountains, Rhodope massif, Pindus, the northeastern mountains of Turkey, and the Caucasus. The chamois has also been introduced to the South Island of New Zealand. Some subspecies of chamois are strictly protected in the EU under the European Habitats Directive. Names The English name comes from French language, French . The latter is derived from Gaulish ''camox'' (attested in Latin, 5th century), itself perhaps borrowing from some Alpine language (Raetic language, Raetic, Ligurian (ancient language), Ligurian). The Gaulish form also underlies German language, German , , , Italian language, Italian , Ladin language, Ladin . The usual pronunciation for the animal is or , approximating the French lang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Flow
Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from . The volcanic rock resulting from subsequent cooling is also often called ''lava''. A lava flow is an outpouring of lava during an effusive eruption. (An explosive eruption, by contrast, produces a mixture of volcanic ash and other fragments called tephra, not lava flows.) The viscosity of most lava is about that of ketchup, roughly 10,000 to 100,000 times that of water. Even so, lava can flow great distances before cooling causes it to solidify, because lava exposed to air quickly develops a solid crust that insulates the remaining liquid lava, helping to keep it hot and inviscid enough to continue flowing. The word ''lava'' comes from Italian and is probably derived from the Latin word ''labes' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hummock
In geology, a hummock is a small knoll or mound above ground.Bates, Robert L. and Julia A. Jackson, ed. (1984). “hummock.” Dictionary of Geological Terms, 3rd Ed. New York: Anchor Books. p. 241. They are typically less than in height and tend to appear in groups or fields. Large landslide avalanches that typically occur in volcanic areas are responsible for formation of hummocks. From the initiation of the landslide to the final formation, hummocks can be characterized by their evolution, spatial distribution, and internal structure. As the movement of landslide begins, the extension faulting results in formation of hummocks with smaller ones at the front of the landslide and larger ones in the back. The size of the hummocks is dependent on their position in the initial mass. As this mass spreads, the hummocks further modify to break up or merger to form larger structures. It is difficult to make generalizations about hummocks because of the diversity in their morphology a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Geological Survey
The California Geological Survey, previously known as the California Division of Mines and Geology, is the California state geologic agency. History Although it was not until 1880 that the California State Mining Bureau, predecessor to the California Geological Survey, was established, the "roots" of California's state geological survey date to an earlier time. As might be expected for a state that owed its existence to the gold rush of 1849, the California State Legislature recognized that geologists could provide valuable information. In 1851, one year after California was admitted to the United States, the Legislature named John B. Trask, a medical practitioner and active member of the California Academy of Sciences, as Honorary State Geologist. In 1853 the Legislature passed a joint resolution asking him for geological information about the state. He submitted a report ''On the Geology of the Sierra Nevada, or California Range''. About two months later, the Legislature creat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Henry Brewer
William Henry Brewer (September 14, 1828 – November 2, 1910) was an American botanist. He worked on the first California Geological Survey and was the first Chair of Agriculture at Yale University's Sheffield Scientific School. Biography William H. Brewer was born in Poughkeepsie, New York and grew up on a farm in Enfield, New York. In 1848 Brewer attended Yale and began studying soil chemistry under Professors Benjamin Silliman and John Pitkin Norton. There, Brewer was a founding member of Berzelius, one of Yale's oldest "secret societies". In 1852 he graduated from the first class of the Sheffield Scientific School with a Bachelor of Philosophy degree and began teaching at the Ovid Academy in Ovid, New York. It was in Ovid where Brewer first befriended Presbyterian minister Laurentine Hamilton. In 1855 Brewer travelled to Europe where he studied natural science under Professor Robert Bunsen at the University of Heidelberg in Germany. He then went to Munich to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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