- Igneous rock
- 根据 3 个来源
A Guide to Basalt: A Common, Fine-grained, Dark-Colored …
2024年1月28日 · Basalt rock is fine-grained, dark-colored volcanic rock with essentially Mg-rich plagioclase and augite. It is basic or low in silica (42-52 wt. %) mafic (Mg- and Fe-rich) rock, …
Basalt | Properties, Formation, Composition, Uses - Geology Science
在geologyscience.com上查看更多信息Basalt is a widespread rock type that occurs in many parts of the world. It is associated with volcanic activity and can be found in various geologic settings, both on land and under the ocean floor. Here are some of the major occurrences and distributions of basalt globally: 1. Oceanic Basalt: The majority of basalt on Earth …- 评论数: 2
- 发布日期: 2018年4月10日
- 预计阅读时间：8 分钟
Basalt | Definition, Properties, & Facts | Britannica
1998年7月20日 · 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 …
Basalt: characteristics, formation, uses - ZME Science
2024年1月4日 · Most Common Volcanic Rock: Basalt is the most abundant volcanic rock type on Earth’s surface, accounting for most of the oceanic crust and large parts of the continental …
Basalt: Igneous Rock - Pictures, Definition, Uses
The volcanic cone grew as recurrent eruptions built up layer after layer of basalt flows. About 100,000 years ago it is thought to have grown tall enough to emerge from the ocean as an island. Today it consists of five overlapping volcanoes.
The Formation and Uses of Basalt: Earth’s Most Common Volcanic …
2024年11月12日 · 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 …
2024年4月10日 · Basalt is a massive, dense, fine-grained, dark-colored volcanic rock with mainly calcic plagioclase, augite, and other minor minerals.
USGS: Volcano Hazards Program Glossary - Basalt
Volcanic rock (or lava) that characteristically is dark in color (gray to black), contains 45 to 53 percent silica, and is rich in iron and magnesium. Basaltic lavas are more fluid than andesites …
Basalt - Minerals Education Coalition
Basalt is a mafic (dark) igneous, extrusive volcanic rock. As such, basalt may be vesicular (containing small cavities) and brecciated (having angular fragments). It is typically hard, tough and dense.
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