Sentence:  When the projectile fell in the mortar with the end of the fuse left outside like a rat's tail, others, more experienced, put the brand to it and ... boom ... boom ... boom ... violent <WSD>terraqueous</WSD> explosions, followed by booming detonations high up in a vast sky now full of stars. 
Meaning of the word marked with <WSD> tags:  Consisting of or involving earth and water.