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The river flows to the north before heading west. Rising on the eastern side of the mountains of Gilead, it runs a course of about 105 kilometers (65 mi) in a wild and deep ravine before flowing into the Jordan River between the Sea of Galilee and the Dead Sea, at a point 1,090 meters (3,576 ft) below its origin. [13]
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 ...
Hornito – Conical structures built up by lava ejected through an opening in the crust of a lava flow; Kīpuka – Area of land surrounded by one or more younger lava flows; Lava – Molten rock expelled by a volcano during an eruption; Lava dome – Roughly circular protrusion from slowly extruded viscous volcanic lava
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 Greenstone Flow is one of the world's largest known lava flows, estimated at a volume ~1650 to ~6000 cubic kilometers of mafic lava. [2] [3] In places, the lava pooled to depth of 487 meters. [4] The flow was generated by a flood basalt eruption during the Midcontinental Rift, which occurred 1.1 billion years ago. [5]
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 ...
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]
The summit of the volcano is an elliptical caldera 1.4 kilometres (0.87 mi) wide and 150 metres (490 ft) deep, [1] formed by collapses of the summit and explosive eruptions. The caldera walls are made of lava flows bearing traces of hydrothermal alteration; the caldera floor is covered by lava flows and pyroclastic debris from explosive ...