Laterite
/ˈlatəɹʌɪt/
"Laterite" in a Sentence (2 examples)
Although the track is ballasted, it does not prevent clouds of reddish dust from the laterite soil blowing about when the train is in motion; after a journey with the windows open a bath is a necessity!
Constant tropical rain makes a mush of hard old lavas. The end product is a brick red soil called laterite.