Detritus (noun)

1. The debris or fragments of rocks that have been worn away from a larger mass by weathering and erosion.
2. The remains of something that has been used or discarded; waste or debris.
3. The waste material left after a process of growth, decay, or dissolution.

Origin:

From latin detritus, past participle of deterere "wear away, rub away".

Examples:

1. The riverbed was covered in detritus from the recent flood.
2. The detritus of the forest floor was composed mainly of fallen leaves.
3. The detritus of the failed business cluttered the once-tidy office.
4. The scientists studied the detritus from the eruption to learn more about the volcano.
5. The detritus of a long-abandoned campfire still smoldered in the clearing.