Rivers
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Images of River Erosion and Deposition
I'm still trying to figure out how to organize this page. Click on any thumbnail to see a full-size image.
 
Canyonlands National Park from Grandview Point
Canyonlands National Park from Grandview Point, Utah
Images of River Erosion
Rivers erode rock by way of solution, hydraulic action (picking up loose particles), and abrasion (impact of moving particles with the stream bed). Canyons become larger by way of deepening, widening, and headward erosion (eating into the edge of a highland because of high stream gradients). River canyons tend towards a 'V' shape due to mass wasting of the canyon slopes, but vertical slot canyons will sometimes occur in more solid rocks.
Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona
Lower Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Lower Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Antelope Canyon at Page, Arizona. Canyon is 130 feet deep (see first two pictures) and only a few feet wide Upper Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Upper Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona Upper Antelope Canyon, a slot canyon in Navajo Sandstone at Page, Arizona
Slot canyon at Kasha Katuwe National Monument, New Mexico Slot canyon at Kasha Katuwe National Monument, New Mexico Narrows along Observation Point Trail, Zion National Park, Utah Horseshoe Bend, an entrenched meander on the Colorado River near Page, Arizona Horseshoe Bend, an entrenched meander on the Colorado River near Page, Arizona Goosenecks of the San Juan River, Utah
Slot canyon at Kasha Katuwe National Monument, New Mexico Slot canyon at Kasha Katuwe National Monument, New Mexico Narrows along Observation Point Trail, Zion National Park, Utah Horseshoe Bend, an entrenched meander on the Colorado River near Page, Arizona Horseshoe Bend, an entrenched meander on the Colorado River near Page, Arizona Goosenecks of the San Juan River, Utah, a series of entrenched meanders
Goosenecks of the San Juan River, Utah, a series of entrenched meanders Goosenecks of the San Juan River, Utah, a series of entrenched meanders Goosenecks of the San Juan River from Muley Point, Utah Entrenched meanders, Little Colorado River, Arizona Active cutting river, the Colorado at Navajo Bridge, Arizona Active cutting river, the Colorado at Navajo Bridge, Arizona
Goosenecks of the San Juan River, Utah, a series of entrenched meanders Goosenecks of the San Juan River, Utah, a series of entrenched meanders Goosenecks of the San Juan River from Muley Point, Utah (highest resolution) Entrenched meanders on the Little Colorado River in Arizona Actively cutting river, the Colorado at Navajo Bridge, Arizona Active cutting river following a flash flood, the Colorado at Navajo Bridge, Arizona
Clear Colorado River at Navajo Bridge Cottonwood Canyon, a slot canyon near Kodachrome        
Clear Colorado River at Navajo Bridge, Arizona (Glen Cyn Dam traps sediment upstream) A slot canyon in Cottonwood Canyon, Utah, in Grand Staircase-Escalante National Monument        
           
           
           
           
Images of River Deposition
As the gradient of rivers and streams decreases, the velocity of the river slows and sediments are deposited. When a channel is choked with too much sediment, a braided stream may develop. This is especially true downstream of glaciers and overgrazed arid lands. When stream flow onto a plain from mountains, an alluvial fan may develop (see also arid landforms). Large rivers with low gradients will form wide floodplains, and when they flow into the ocean, a delta may form.
           
           
           
           
           
           
           
           
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