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Flagstaff, Arizona
Flagstaff ( ), known locally as Flag, is the county seat of Coconino County, Arizona, in the southwestern United States. As of the 2020 United States census, the city's population was 76,831. Flagstaff is the principal city of the Coconino County, Arizona, Flagstaff metropolitan area, which includes all of Coconino County, Arizona, Coconino County, and has a population of 145,101. Flagstaff lies near the southwestern edge of the Colorado Plateau and within the San Francisco volcanic field, along the western side of the largest contiguous Pinus ponderosa, ponderosa pine forest in the continental United States. The city sits at around and is next to Mount Elden, just south of the San Francisco Peaks, the highest mountain range in the state of Arizona. Humphreys Peak, the highest point in Arizona at , is about north of Flagstaff in Kachina Peaks Wilderness. The geology of the area includes exposed rock from the Mesozoic and Paleozoic eras, with Moenkopi Formation red sandstone ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Municipalities In Arizona
Arizona is a U.S. state, state located in the Western United States. According to the 2020 United States census, Arizona is the List of U.S. states and territories by population, 14th most populous state with 7,151,502 inhabitants (as of the 2020 census) and the List of U.S. states and territories by area, 6th largest by land area spanning . Arizona is divided into 15 counties and contains 90 incorporated place, incorporated City#United States, cities and Town#Arizona, towns. Incorporated places in Arizona are those that have been granted home rule, possessing a local government in the form of a City council, city or town council. Most of the population is concentrated within the Phoenix metropolitan area, with a 2020 United States census, 2020 census population of 4,845,832 ( of the state population). Phoenix, Arizona, Phoenix is the capital and largest city by population in Arizona with 1,608,139 residents, is ranked as the fifth List of United States cities by population, most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Francisco Volcanic Field
The San Francisco volcanic field is an area of volcanoes in northern Arizona, north of Flagstaff, US. The field covers 1,800 square miles (4,700 km2) of the southern boundary of the Colorado Plateau. The field contains 600 volcanoes ranging in age from nearly 6 million years old to less than 1,000 years (Miocene to Holocene), of which Sunset Crater is the youngest. The highest peak in the field is Humphreys Peak, at Flagstaff's northern perimeter: the peak is Arizona's highest at 12,633 feet (3,851.5 m) and is a part of the San Francisco Peaks, an active stratovolcano complex. Description This volcanic field seems to have formed from a geological hotspot. As the North American Plate moves over the spot, new volcanoes appear. Thus, the newest volcanoes are at the east side of the field. Most of the volcanoes are basalt cinder cones, but there are also large lava domes consisting of rhyolite and dacite. Given that Sunset Crater is such a young volcanic feature of this ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinagua
The Sinagua were a pre-Columbian culture that occupied a large area in central Arizona from the Little Colorado River, near Flagstaff, Arizona, Flagstaff, to the Verde River, near Sedona, Arizona, Sedona, including the Verde Valley, area around San Francisco Mountain, and significant portions of the Mogollon Rim country, between approximately . Since fully developed Sinagua sites emerged in central Arizona around 650 CE, it is believed they migrated from east-central Arizona, possibly emerging from the Mogollon culture. Name The name ''Sinagua'' was coined in 1939 by archaeologist Harold S. Colton,Gibbon 770 founder of the Museum of Northern Arizona, from the Spanish words ''sin'' meaning "without" and ''agua'' meaning "water", referring to the name originally given by Spanish explorers to the San Francisco Peaks near Flagstaff, the "Sierra Sin Agua". The name reflects the surprise the Spanish felt that such large mountains did not have perennial rivers flowing from them, as is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-Columbian
In the history of the Americas, the pre-Columbian era, also known as the pre-contact era, or as the pre-Cabraline era specifically in Brazil, spans from the initial peopling of the Americas in the Upper Paleolithic to the onset of European colonization of the Americas, European colonization, which began with Christopher Columbus's voyage in 1492. This era encompasses the history of Indigenous peoples of the Americas, Indigenous cultures prior to significant European influence, which in some cases did not occur until decades or even centuries after Columbus's arrival. During the pre-Columbian era, many civilizations developed permanent settlements, cities, agricultural practices, civic and monumental architecture, major Earthworks (archaeology), earthworks, and Complex society, complex societal hierarchies. Some of these civilizations had declined by the time of the establishment of the first permanent European colonies, around the late 16th to early 17th centuries, and are know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio De Flag
The Rio de Flag, which has historically been known as the River de Flag and San Francisco River, is a river in Arizona that runs through Flagstaff, originating from the San Francisco Peaks before draining into the Little Colorado River. The river's age is unknown, though its first channels were around over one million years ago. Headwaters Four springs in the San Francisco Peaks originate the river; they would not produce enough water to maintain flow if not for the heavy rain and snowfall of the area supplementing the levels in the channel. The main headwaters of the river are the Leroux Springs, located up Snowbowl Road just northwest of the city, with Taylor Spring and Chimney Spring also sourcing it, and most of the south face snowmelt filling the river, too. Edward Fitzgerald Beale and his men, in planning for his wagon road, visited the Leroux Springs on September 12, 1857. He described the spring and the start of the river as such: "Leroux's spring is one of transparen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moenkopi Formation
The Moenkopi Formation is a geological formation that is spread across the U.S. states of New Mexico, northern Arizona, Nevada, southeastern California, eastern Utah and western Colorado. This unit is considered to be a Geological unit, group in Arizona. Part of the Colorado Plateau and Basin and Range Province, Basin and Range, this red sandstone was laid down in the Early Triassic, Lower Triassic and possibly part of the Middle Triassic, around 240 million years ago. History of investigation There is no designated Type locality (geology), type locality for this formation. It was named for a development at the mouth of Moencopie Wash in the Grand Canyon area by Ward in 1901. In 1917 a 'substitute' type locality was located by Gregory in the wall of the Little Colorado Canyon, about 5 miles below Tanner Crossing in Coconino County, Arizona. While in the Great Basin, Bassler and Reeside characterized and named the Rock Canyon Conglomerate, Virgin Limestone, and Shnabkaib Shale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic ( , , ; or Palaeozoic) Era is the first of three Era (geology), geological eras of the Phanerozoic Eon. Beginning 538.8 million years ago (Ma), it succeeds the Neoproterozoic (the last era of the Proterozoic Eon) and ends 251.9 Ma at the start of the Mesozoic Era. The Paleozoic is subdivided into six period (geology), geologic periods (from oldest to youngest), Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Some geological timescales divide the Paleozoic informally into early and late sub-eras: the Early Paleozoic consisting of the Cambrian, Ordovician and Silurian; the Late Paleozoic consisting of the Devonian, Carboniferous and Permian. The name ''Paleozoic'' was first used by Adam Sedgwick (1785–1873) in 1838 to describe the Cambrian and Ordovician periods. It was redefined by John Phillips (geologist), John Phillips (1800–1874) in 1840 to cover the Cambrian to Permian periods. It is derived from the Ancient Greek, Greek ''palaiós'' (π� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozoic
The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian reptiles such as the dinosaurs, and of Gymnosperm, gymnosperms such as cycads, ginkgoaceae and Araucariaceae, araucarian conifers; a hot Greenhouse and icehouse earth, greenhouse climate; and the tectonic break-up of Pangaea. The Mesozoic is the middle of the three eras since Cambrian explosion, complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, Pterosaur, pterosaurs, Mosasaur, mosasaurs, and Plesiosaur, plesiosaurs. The Mesozoic was a time of significant tectonic, climatic, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene is an interglacial period within the ongoing Ice age, glacial cycles of the Quaternary, and is equivalent to Marine isotope stages, Marine Isotope Stage 1. The Holocene correlates with the last maximum axial tilt towards the Sun of the Earth#Axial tilt and seasons, Earth's obliquity. The Holocene corresponds with the rapid proliferation, growth, and impacts of the human species worldwide, including Recorded history, all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban culture, urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global significance for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kachina Peaks Wilderness
Kachina Peaks Wilderness is a wilderness area about north of Flagstaff, Arizona, Flagstaff within the Coconino National Forest in the United States, U.S. state of Arizona. The wilderness encompasses most of the upper reaches of the San Francisco Peaks including Humphreys Peak, Arizona's highest point at . The area is named for the Hopi spirit beings, or Kachinas, some of whom according to Hopi mythology live here from July to December. In mid-summer kachinas can bring clouds and rain from the top of the peaks to the Hopi mesas during the seasonal monsoons. These peaks are sacred to tribes including the Havasupai, Hopi, Navajo people, Navajo, and Zuni people, Zuni. Several religious shrines have been identified in the wilderness, some of which are still in use. Geology Kachina Peaks Wilderness is part of a large composite volcano that last erupted roughly two million years ago. Some of the area's trails lead to the top of the Kachina Peaks: Humphreys Peak, Doyle Peak (11,4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humphreys Peak
Humphreys Peak (, "its summit never melts") is the highest mountain and the second most prominent peak after Mount Graham in the U.S. state of Arizona. With an elevation of , it is located within the Kachina Peaks Wilderness in the Coconino National Forest, about north of Flagstaff, Arizona. Humphreys Peak is the highest of a group of dormant volcanic peaks known as the San Francisco Peaks. Humphreys Peak was named in about 1870 for General Andrew A. Humphreys, a U.S. Army officer who was a Union general during the American Civil War, and who later became Chief of Engineers of the United States Army Corps of Engineers. However, a United States General Land Office map from 1903 showed the name ''San Francisco Peak'' applied to this feature (apparently borrowed from San Francisco Mountain on which the peak stands). Thus the United States Board on Geographic Names approved the variant name in 1911. In 1933, the application of the names was rectified. Geology Humphreys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
