What are some characteristics of basalt?

Basalt are dark color or melanocratic rock, they are fine grained and contains pyroxene and plagioclase feldspar. They are formed or Crystalized as an extrusive rock although sometimes they can form as a dyke in other rock body. 123 Views. Amit Fadanvis, MSc. Geology Geology, Nagpur University (2014). read more

Basalt are dark color or melanocratic rock, they are fine grained and contains pyroxene and plagioclase feldspar. They are formed or Crystalized as an extrusive rock although sometimes they can form as a dyke in other rock body. read more

Basalt magmas form by decompression melting of peridotite in the Earth's mantle, a process discussed in the entry for igneous rocks. The crustal portions of oceanic tectonic plates are comprised predominantly of basalt, produced from upwelling peridotite in the mantle below ocean ridges. read more

Examples of igneous rocks include basalt, granite, pumice, obsidian, tuff, diorite, gabbro and andesite. Granite is a common rock that contains at least 25% quartz and is sometimes used in construction because of its strength. read more