What is Basalt
Basalt is a common extrusive volcanic rock, usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet; but may be porphyritic, or vesicular, or frothy scoria. Lady King Basalt is porphyritic, containing light colored feldspar crystals in a fine black matrix (see Lady King Basalt photo lower right).
What is Columnar Basalt
“Columnar Basalt” is a geological term used to describe a typically hexagonal pattern of jointing(fracturing) caused by shrinkage during the solidification phase of some basalt lava flows formed during volcanic eruptions; resulting in long six(can be 4 or 5) sided columns (See Lady King photos to the right).
Usages of Columnar Basalt
Because of its multiple flat sides and varied length “Columnar Basalt” is well suited for use in landscaping projects such as walls, stairways, walkways, fountains, garden displays or other decorative features.