| Kohala Mountains | |
|---|---|
 A view of Kohala Volcano from the slopes of Mauna Kea |
|
| Elevation | 5,480 feet (1,670 m) |
| Location | Hawaii, USA |
| Range | Hawaiian Islands |
| Coordinates | |
| Topo map | USGS Kamuela |
| Type | Shield volcano |
| Volcanic arc/belt | Hawaiian-Emperor seamount chain |
| Age of rock | 460,000-120,000 yr |
Kohala, also known as the "Kohala ," is the name of an extinct volcano on Hawaii Island in the state of Hawaii. In topography a summit is a point on a surface which is higher in Elevation than all points immediately adjacent to The State of Hawaii ( or həˈwaɪʔiː Hawaiian: Mokuāina o Hawaii) is a state in the United States located on an Archipelago in the The United States of America —commonly referred to as the A mountain range is a chain of Mountains bordered by highlands or separated from other mountains by passes or valleys The Hawaiian Islands, once known as the Sandwich Islands, form an Archipelago of 19 Islands and Atolls numerous smaller A geographic coordinate system enables every location on the Earth to be specified in three coordinates using mainly a spherical coordinate system. A topographic map is a type of Map characterized by large-scale detail and quantitative representation of relief, usually using Contour lines in modern The United States Geological Survey ( USGS) is a scientific agency of the United States government. Mountains can be characterized in several ways Some mountains are Volcanoes and can be characterized by the type of lava and eruptive history A shield volcano is a large Volcano with shallow-sloping sides A volcanic arc is a chain of volcanic islands or Mountains formed by Plate tectonics as an oceanic Tectonic plate subducts under A volcanic belt is a large volcanically active region Other terms are used for smaller areas of activity such as volcanic fields Volcanic belts are found above zones The Hawaiian-Emperor seamount chain is composed of the Hawaiian Ridge, consisting of the islands of the Hawaiian chain northwest to Kure Atoll, and the Emperor The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other The Island of Hawaii, also called the Big Island or Hawaii Island, is a volcanic Island in the U The State of Hawaii ( or həˈwaɪʔiː Hawaiian: Mokuāina o Hawaii) is a state in the United States located on an Archipelago in the At its highest elevation, Kohala is 5,480 feet (1,670 m) above sea level.
Kohala is believed to be the oldest volcano that makes up Hawaii Island, which was formed by the Hawaii hotspot. The Hawaii hotspot is perhaps the best known volcanic hotspot on Earth, responsible for the Hawaiian Islands in the Pacific Ocean. It is thought to have breached sea level about 500,000 years ago. Mean sea level (MSL is the average (mean height of the Sea, with reference to a suitable reference surface Its eruptive activity began to wane about 300,000 years ago. At about this time, it is thought that the volcano was about twice as wide as it is today. However, because the island of Hawaii is slowly sinking into the Pacific Ocean's seafloor, the volcano began to sink faster than new eruptions could replace what was being lost to subsidence. The Pacific Ocean is the largest of the Earth 's Oceanic divisions Thus, the volcano's size began to recede as it sank below sea level. Kohala's activity continued to wane and it is thought that the volcano last erupted about 120,000 years ago.
As Kohala slowly waned, its southern flanks were buried by the two younger volcanoes, Mauna Kea and Mauna Loa. Mauna Kea is a Dormant volcano in the Hawaiian Islands, one of five volcanoes which together form the Island of Hawaii. Mauna Loa is the largest volcano on earth and one of five volcanoes that form the Island of Hawaii in the U Since Kohala'a southern flanks are buried, it is difficult to determine the size and shape of the volcano when it was at its prime.
About 250,000 to 300,000 years ago, a large landslide on the northeastern flank of the volcano removed a massive portion of the mountain, estimated to be as much as a section 20 kilometers wide. A landslide is a geological phenomenon which includes a wide range of ground movement such as rock falls deep failure of slopes and shallow debris flows which can occur The part of the mountain removed by the landslide collapsed into the ocean at a very high speed and traveled as much as 130 kilometers across the ocean floor. The large seacliffs on the northeast flank of the volcano mark the headwall of this landslide.
Kohala is named after the district of Kohala, which exists on the volcano's southwest flank. Kohala is the name of two districts — North Kohala and South Kohala — on the northwest portion of the island of Hawai‘i in the Hawaiian Archipelago
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