Special sensors create three-dimensional maps of deep geological formations.

They went in deep formation, so that if they ran into an ambush, the tail could circle and outflank the attackers to free the head.

Such open formations allowed the Romans, often outnumbered, to outflank an enemy using a deep formation.

The Surena's cataphracts raced forward, to be stopped by the deep Roman formation.

The secondary is lined up in a "two deep" formation, which the Giants use more than any other team.

It's a deep formation.

The oil contains biomarkers closely related to other very old oils which were long trapped in deep formations.

The clasts originate in deeper formations and have been brought up by diatreme or intrusive breccias.

Blade led Sarnila through the soldiers as they swung into a formation six-men wide and two deep across the lane.

Usually they had a two ranks deep formation of heavy cavalry charging the enemy.