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See all on WikipediaFlood basalt - Wikipedia
A flood basalt (or plateau basalt ) is the result of a giant volcanic eruption or series of eruptions that covers large stretches of land or the ocean floor with basalt lava. Many flood basalts have been attributed to the onset of a hotspot reaching the surface of the Earth via a mantle plume. Flood basalt provinces such as the … See more
Flood basalts are the most voluminous of all extrusive igneous rocks, forming enormous deposits of basaltic rock found throughout the geologic record. They are a highly distinctive form of intraplate volcanism, … See more
Flood basalts contribute significantly to the growth of continental crust. They are also catastrophic events, which likely contributed to many See more
Representative continental flood basalts and oceanic plateaus, arranged by chronological order, together forming a listing of See more
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• Supervolcano – Volcano that has had an eruption with a volcanic explosivity index (VEI) of 8
• Volcanic plateau – Plateau produced by volcanic activity See moreTheories of the formation of flood basalts must explain how such vast amounts of magma could be generated and erupted as lava in such short … See more
Large Igneous Provinces (LIPs) were originally defined as voluminous outpourings, predominantly of basalt, over geologically very short durations. This definition did not specify minimum size, duration, petrogenesis, or setting. A new attempt to refine … See more
Trap rock is the most durable construction aggregate of all rock types, because the interlocking crystals are oriented at random. See more
Wikipedia text under CC-BY-SA license Columbia Plateau Province - U.S. National Park Service
Apr 30, 2018 · Over 170,000 cubic kilometers (105,633 mi) of basaltic lava, known as the Columbia River Basalts, covers the western part of the province. These tremendous flows erupted between 17 million - 6 million years ago.
Volcanic plateau - Wikipedia
Lava plateaus are formed by highly fluid basaltic lava during numerous successive eruptions through numerous vents without violent explosions (quiet eruptions). These eruptions are quiet because of the low viscosity of the lava and the small amount of trapped gases. The resulting sheet lava flows may be extruded from linear fissures or rifts or gigantic volcanic eruptions through multiple vents characteristic of the prehistoric era which produced giant flood basalts. Multiple su…
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Columbia River Basalt Group Stretches from Oregon to Idaho
Dec 7, 2023 · Columbia River Basalt Group map shows main regions of basalt exposure in Washington, Oregon, Idaho and Nevada, USA. Flood basalt lava flow in stacked layers viewed …
Plateau | Definition, Geography, Landform, Types, & Examples
- plateau, extensive area of flat upland usually bounded by an escarpment (i.e., steep slope) on a…
Although plateaus stand at higher elevation than surrounding terrain, they differ from mountain ranges in that they are remarkably flat. Some plateaus, like the Altiplano in southern Peru and western Bolivia, are integral parts of mountain belts. Others, such as the Colorado Plateau (acr…
- plateau, extensive area of flat upland usually bounded by an escarpment (i.e., steep slope) on a…
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Plateau Basalts (AKA Flood Basalts) | SpringerLink
Jun 17, 2022 · Plateau lavas are essentially basaltic (dominated by tholeiites, with minor alkaline components), but they can include silicic products with erupted volumes >10 4 km 3 (Bryan et …
Lava Flows - Volcanoes, Craters & Lava Flows (U.S.
Apr 18, 2023 · Basaltic lavas have low silica (45-52 weight %), are hot (2200°F; 1200°C), and have low viscosity, meaning that they flow easily. Basaltic lava flows may travel many miles (kms) from their vents, and up to hundreds of miles …
Inflation Structures, Lava-Rise Plateaus & Inflation Pits
Apr 18, 2023 · Inflation is the process that occurs when lava continues to be supplied within a solidified crust of a basaltic lava flow, causing the flow surface to be lifted upward. Inflation can cause lava flows to substantially thicken and …
Morphology and dynamics of inflated subaqueous …
Apr 29, 2014 · During eruptions onto low slopes, basaltic Pahoehoe lava can form thin lobes that progressively coalesce and inflate to many times their original thickness, due to a steady injection of magma beneath brittle and viscoelastic …
Morphology and Architecture of Flood Basalt Lava Flows and
Nov 26, 2017 · The morphological types of flood basalt lava flows (pāhoehoe, ‘a’ā, etc.) are guides to their emplacement dynamics, with the relationships between flow conditions and lava flow …
What are the different types of basaltic lava flows and how do …
May 6, 2010 · There are three types of basalt lava flows: pillow, pahoehoe, and a'a. Pillow lavas are volumetrically the most abundant type because they are erupted at mid-ocean ridges and …
The Magmatic Architecture of Continental Flood Basalts I: …
Nov 4, 2021 · A typical continental flood basalt (CFB) is emplaced in hundreds of individual eruptive episodes lasting decades to centuries with lava flow volumes of 10 3 –10 4 km 3. …
USGS Volcanoes
The subsidence of the crust produced a large, slightly depressed lava plain now known as the Columbia Basin (Plateau). The ancient Columbia River was forced into its present course by …
Plateau - The shape of the land, Forces and changes, Spotlight …
The lava that floods the landscape to create a lava plateau is composed primarily of basalt, a hard, often glassy, black volcanic rock. Basalt has low silica content, and the lava it creates …
Rifting of the oceanic Azores Plateau with episodic volcanic …
Nov 12, 2020 · Extension of the Azores Plateau along the Terceira Rift exposes a lava sequence on the steep northern flank of the Hirondelle Basin. Unlike typical tholeiitic basalts of oceanic …
Stony Point diabase—Forms sheet-like intrusion that is discordant to volcanic stratigraphy of the Larsmont and Sucker River basalts (Fig. 1). Exposed portion of sill is calculated to be as thick …
An immense shield volcano within the Shatsky Rise oceanic …
Sep 5, 2013 · Seismic images of the Tamu Massif, part of the Shatsky Rise oceanic plateau in the northwestern Pacific Ocean, show that it is a single immense volcano, potentially the largest …
Basaltic and Other Low-Viscosity Lavas | SpringerLink
Eruptions of basaltic magmas are the most frequent and voluminous on Earth (Plate 5.1), especially in submarine environments along the mid-ocean ridges, where they are largely …
In May 1983, the Missouri Natural Areas Committee (MONAC) adopted a Geologic Natural Features Classification System (GNFCS) designed specifically for Missouri.
Geology in Missouri | Missouri's Natural Heritage | Washington ...
Jan 2, 2020 · These volcanoes erupted molten ash that cooled quickly forming rhyolite, an igneous rock that has high silica content. The more silica in lava, the more viscous it is and the …
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