The phrase "square formation" is correct and usable in written English.
You can use it to describe a type of military formation, such as "The troops marched in square formation down the parade route."
The pins were set up in a square formation with one corner toward the bowler.
Quadrille, fashionable late 18th- and 19th-century dance for four couples in square formation.
Mary is seated on a raised platform, surrounded by a square formation of stone-faced angels.
In another, a cocky Bonaparte entertains a terrified group of scientists inside a square formation of French infantrymen being attacked by Egyptian cavalry.
Twice, by my count, four dancers moved in unison in a square formation, but this was no more remarkable than if four fairies had done it in "The Sleeping Beauty".
Square dance, dance for four couples (or groups of four couples) standing in square formation, the most popular and widely known type of folk dance in the United States.
Hundreds of bamboo mussel farms pepper the waterways, arranged in square formations.
Later contredanses on the Continent appropriated square formations from country dancing; these became the popular cotillion and quadrille (qq.v.).
It was the first time on a battlefield that they would assemble 1,000 men and they would march forward like a machine in these square formations.
Later contredanses on the Continent appropriated square formations from country dancing; these became the popular cotillion and quadrille.
Larger islands appear to be produced by 2D aggregation of smaller square formations.
