Kilauea Eruptions and the Hawaiian Archipelago The Geology of Plate Tectonics and Hotspots
##plugins.themes.bihistory.article.main##
Abstract
Abstract
A four-month surge of Mount Kilauea eruptions (May to August 2018) on the Big Island reminds us that the whole chain of Hawaiian islands has been built by volcanic activity. Kilauea is one of five volcanoes that built the Big Island; a future island (Lo’ihi) is growing on the seafloor 20 miles to the southeast. A plume of rising magma from deep inside the Earth’s mantle underlies a seafloor hotspot; lava is forced through vents in the Earth’s crust; as the Pacific seafloor moves northwest from its origin at the East Pacific Rise, this stationary hotspot creates a line of volcanic islands. To the northwest, submerged seamounts remain as remnants of former islands once formed over this hotspot. A northward chain known as the Emperor Seamounts reveals that this same hotspot has created more than 100 volcanoes over 70 million years. The Hawaiian and Emperor seamounts are not unique. The New England Seamounts off the coast of Massachusetts and similar chains in the South Atlantic record the east-west spread of the Atlantic seafloor over mid-ocean hotspots. In the Indian Ocean, north-running seamount chains record the northward movement of the Indian plate following the breakup of Pangea. In the United States, a line of extinct craters west of Yellowstone across Idaho mark the westward movement of the North American plate over the hotspot now under Yellowstone National Park.
##plugins.themes.bighistory.article.details##
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).