detritus
noun [ U ] uk/dɪˈtraɪ.təs/ us/dɪˈtraɪ.t̬əs/
formal（尤指某项活动后留下的）废弃物，垃圾
waste material or rubbish, especially left after a particular event
The stadium was littered with the detritus of yesterday's concert. 体育场里到处都是昨天举行音乐会后留下的垃圾。
biology specialized风化物;岩屑
a loose mass of decaying material