岩屑（detritus）是火山活动过程中火山通道的围岩、已凝固和半凝固的熔岩和未凝固的熔浆经火山作用爆碎后形成的岩石碎块。
当岩浆撞击岩层时，会出现岩屑，形成液态和固态物质的混合物。
As the magma smashes through layers of rock, it rips out debris, creating a mix of liquid and solid material.
一场热带风暴带来的降雨把岩屑从火山坡上冲走了。
Rainfall from a tropical storm dislodged the debris from the slopes of the volcano.
这些无法归类的动物包括被称为奇虾的会游泳的大型食肉动物，以及叫做威瓦亚虫的软体动物，它们以岩屑和藻类为食。
These unassignable animals include a large swimming predator called Anomalocaris and a soft-bodied animal called Wiwaxia, which ate detritus or algae.
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