Raised End Basalt Garden Bench, L48x16xH26
About the material: Columnar Basalt
Although basalt is typically a dark black rock, it often weathers to a yellow-brown color similar to the rocks shown here.
The unique hexagonal shape of the basalt column is natural. During the cooling of a thick lava flow, contractional joints or fractures form. If a flow cools relatively rapidly, significant contraction forces build up. While a flow can shrink in the vertical dimension without fracturing, it can’t easily accommodate shrinking in the horizontal direction unless cracks form; the extensive fracture network that develops results in the formation of columns. The topology of the lateral shapes of these columns can broadly be classed as a random cellular network. These structures are predominantly hexagonal in cross-section. The size of the columns depends loosely on the rate of cooling; very rapid cooling may result in very small columns, while slow cooling is more likely to produce large columns.