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See all on WikipediaBasalt - Wikipedia
Basalt is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is … See more
Basalt is composed mostly of oxides of silicon, iron, magnesium, potassium, aluminum, titanium, and calcium. Geologists See more
Earth
Basalt is the most common volcanic rock type on Earth, making up over 90% of all volcanic rock on the … See moreThe common corrosion features of underwater volcanic basalt suggest that microbial activity may play a significant role in the chemical exchange between basaltic rocks and … See more
Basalt is used in construction (e.g. as building blocks or in the groundwork), making cobblestones (from columnar basalt) and in making statues. Heating and See more
• Basalt fan structure – Rock formation
• Basalt fiber – Structural fibres spun from melted basalt
• Bimodal volcanism – Eruption of both mafic and felsic lavas from a single volcanic centre See moreWikipedia text under CC-BY-SA license Flood 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 Deccan Traps of India are often called traps, after the Swedish word trappa (m…
Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 10 mins
List of places with columnar jointed volcanics - Wikipedia
Columnar jointing of volcanic rocks exists in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern …
- Estimated Reading Time: 6 mins
Basaltic Lava Flows - Volcanoes, Craters & Lava Flows (U.S.
Volcanism: Andesitic & Basaltic Lava, Distribution of Volcanoes
- There is a huge temperature differencebetween the inner layers and the outer layers of the earth due to the differential amount of radioactivity.
- This temperature difference gives rise to convectional currentsin the mantle.
- The convection currents in the mantle create convergent and divergent boundaries (weak zones).
- There is a huge temperature differencebetween the inner layers and the outer layers of the earth due to the differential amount of radioactivity.
- This temperature difference gives rise to convectional currentsin the mantle.
- The convection currents in the mantle create convergent and divergent boundaries (weak zones).
- At the divergent boundary, molten, semi-molten and sometimes gaseous material appears on earth at the first available opportunity.
- Reviews: 3
- Published: Dec 21, 2019
- Estimated Reading Time: 9 mins
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What are the different types of basaltic lava flows and
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 …
USGS: Volcano Hazards Program Glossary - Basalt
Basalt is a hard, black volcanic rock with less than about 52 weight percent silica (SiO2). Because of basalt's low silica content, it has a low viscosity (resistance to flow). Therefore, basaltic lava …
Flood Basalts | Volcano World | Oregon State University
Flood basalts are yet another strange type of "volcano." Some parts of the world are covered by thousands of square kilometers of thick basalt lava flows - individual flows may be more than …
Basalt | Definition, Properties, & Facts | Britannica
Mar 8, 2025 · Basalt, extrusive igneous (volcanic) rock that is low in silica content, dark in color, and comparatively rich in iron and magnesium. Basalts may be broadly classified on a chemical and petrographic basis into two main groups: …
Basalt | Properties, Formation, Composition, Uses
Apr 23, 2023 · Definition, composition, and characteristics of basalt: Basalt is a fine-grained volcanic rock that forms from the rapid cooling of lava at or near the Earth’s surface.
Types of volcano - British Geological Survey
Shield volcanoes, on the other hand, have gentle slopes that are less than 10° and erupt more fluid lavas called basalt. When a shield volcano erupts, the basalt can flow great distances away from the vent to produce broad, gentle slopes.
A Guide to Basalt: A Common, Fine-grained, Dark-Colored …
Aug 17, 2023 · Basalt is a mafic volcanic rock with primarily calcic plagioclase feldspar and augite. It may also contain smaller amounts of olivine, enstatite, quartz, feldspathoids, alkali feldspar …
Basalt: Igneous Rock - Pictures, Definition, Uses & More
Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock, such as a lava flow, but can also form …
Basaltic Volcanism: From Magmatic Processes to Eruptive Styles
Basaltic volcanoes are characterized by persistent periods of activity ranging from effusive lava flows to explosive eruptions with variable intensity (i.e., lava fountains to high-intensity, short …
Basaltic Lava: Types, Composition, Formation, and Landforms
Oct 10, 2024 · Basaltic lava, a prevalent volcanic rock on Earth, significantly influences the planet’s surface. Known for its fluidity and relatively low viscosity, basaltic lava contributes to …
Continental basaltic volcanoes — Processes and problems
Nov 20, 2008 · Monogenetic basaltic volcanoes are the most common volcanic landforms on the continents. They encompass a range of morphologies from small pyroclastic constructs to …
The Formation and Uses of Basalt: Earth’s Most Common …
Nov 12, 2024 · Basalt is one of Earth’s most abundant and widely distributed volcanic rocks, known for its dark color and dense structure. Formed from the rapid cooling of lava at or near …
Basalt Properties, Composition and Formation | Earth Know
Apr 10, 2024 · Basalt is a mafic or dark-colored, volcanic or extrusive igneous rock. Mafic refers to rocks high in dark-colored minerals rich in iron and magnesium. These rocks are relatively low …
Volcanology photoglossary: basalt - VolcanoDiscovery
Nov 7, 2023 · Basalt is by far the most common volcanic rock type. Basaltic magma is formed by partial melting of material from the upper mantle, and and is therefore typical for volcanism at …
Basalt - (Intro to Geology) - Vocab, Definition ... - Fiveable
Basalt is a fine-grained, dark-colored igneous rock that forms from the rapid cooling of lava at or near the Earth's surface. It is the most common type of volcanic rock and is primarily …
Isotopic and compositional constraints on the source of basalt ...
Feb 27, 2025 · Orbital observations have shown that parts of the far side of the Moon are covered with volcanic basalt. The Chang’e-6 spacecraft landed in one of those regions, collected …
Earth's orbital rhythms link timing of giant eruptions and climate …
Mar 10, 2025 · For the first time, these new high-resolution geochemical records reveal when and how two major eruption phases of gigantic flood basalt volcanism had an impact on climate …
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