Definition of basalt
: a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite
basalticplay \bə-ˈsȯl-tik\ adjective
Recent Examples of basalt from the Web
Well is a fascinating formation in the basalt shoreline at Cape Perpetua, and a hotspot for tourists intrigued by its reputation.
Lim now also runs a similar dual-purposed research project, called Biologic Analog Science Associated with Lava Terrains, that is looking at hydrothermal variations in the basalt terrains of volcanoes in Idaho and Hawaii.
A vast network of passageways made from massive basalt boulders in the 16th century BC leads to spiral staircases that climb 57 feet up to the central spire of a four-tower fortress.
Atop a steep basalt outcrop, the students quickly spotted several of the brown, mottled snakes sunning themselves among the rocks.
Sierra Silica Resources, Oroville: $174,281 for bags of basalt, Feb. 17.
The desert canyon of green trees and brown vegetation suddenly morphs into a black basalt beauty, with massive drop-offs, jagged ridges and a giant meandering river that appears to be miles away.
Also of note is a basalt-lava cross on a small mound, marking one of the three original battlefield bunkers.
A Muslim tribe provided the black basalt stone that adorns St. George’s Church in Adir on the outskirts of Karak.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'basalt.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of basalt
Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egypt bḫnw
First Known Use: 1601See Words from the same year
BASALT Defined for English Language Learners
Definition of basalt for English Language Learners
: a type of dark gray to black rock
Seen and Heard
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