Facts about Basalt
- 09
Basalt's melting point reaches approximately 1300 degrees Celsius, making it one of the most heat-resistant naturally occurring rocks and ideal for high-temperature industrial applications including furnace linings and brake components.
- 08
Ancient Romans used basalt to construct roads like the Appian Way, which remains intact after more than 2,000 years due to the stone's exceptional durability and resistance to weathering.
- 07
In 1912, geologist Alfred Harker identified that basalt comprises approximately 90 percent of all volcanic rock on Earth's continental and oceanic surfaces.
- 06
Underwater mid-ocean ridges produce new oceanic basalt crust at rates varying from 2 centimeters per year at slow-spreading ridges to 16 centimeters annually at fast-spreading ridges like the East Pacific Rise.
- 05
Basalt's crystalline structure forms pillar-like hexagonal columns up to 40 meters tall, exemplified by the Giant's Causeway in Northern Ireland containing approximately 40,000 such formations.
- 04
Basalt's high iron and magnesium content makes it approximately 3.0 times denser than water, causing it to sink and form the oceanic crust beneath Earth's seas.
- 03
Columbia River's Flood Basalts in Oregon and Washington cover approximately 163,000 square kilometers and erupted between 17 and 14 million years ago during the Miocene epoch.
- 02
At roughly 1200 degrees Celsius, basalt lava flows across Hawaii's volcanic landscape at speeds reaching 10 meters per hour during eruptions.
- 01
The Moon's dark maria regions consist primarily of basalt formed between 3.8 and 1.2 billion years ago from ancient volcanic eruptions.