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In southern Louisiana the word coulée (also spelled coolie) originally meant a gully or ravine usually dry or intermittent but becoming sizable during rainy weather. As stream channels were dredged or canalized, the term was increasingly applied to perennial streams, generally smaller than bayous. The term is also used for small ditches or ...
The lava that flows in lava channels is commonly basaltic in composition. Pāhoehoe lava flow on the Big Island of Hawaii The picture shows overflows from a main lava channel. The channel is crusting over with a v-shaped opening pointing upstream (top left). The main channel and overflows show the perched nature of this kind of lava channel.
The two main types of lava field structures are defined as sheet flow lava and pillow lava. Sheet flow lava appears like a wrinkled or folded sheet, while pillow lava is bulbous, and often looks like a pile of pillows atop one another. [2] An important aspect of lava flow morphology is a phenomenon known as lava flow inflation. This occurs in ...
The Hawaii Emergency Management Agency tweeted that because the lava has moved into "less steep terrain," there is "more time for preparation and early warning" since lava moves faster in steep ...
In the scientific literature, both mesas are also known as North Oroville Table Mountain and South Oroville Table Mountain in order to differentiate them from the Tuolumne Table Mountain, which is also capped by the eroded remnant of a basaltic (or, more properly, a latite) lava flow, in the central foothills of California. [1]
According to Merriam-Webster, a ravine is "a small, narrow, steep-sided valley that is larger than a gully and smaller than a canyon and that is usually worn by running water". [1] Some societies and languages do not differentiate between a gully and ravine; in others, there is a distinction, particularly when concerning environmental ...
The lava dome likely formed before the lava flows erupted, suggested by its steep western side and the appearance of rock from the dome on the western lava flow. The dome's 20-foot (6 m) deep depression may have formed when the dome's top collapsed as lava moved out of the volcano during the eruption of the two flows. [19]
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