Loose rock fragments can be caused by weathering, or indeed erosion. They can be found in a scree slope, and alluvial fan, a beach, in the soil (they are the soil, sometimes).
Loose rock fragments are known to a geologist as 'Unconsolidated sediment' which can be classified into various groups. Consider alluvium; the deposit from a river.
ice and loose rocks
Loose rock material is called detritus.
Sand.
When older rocks, plants, and other loose material get pressed or cemented together
They're called clastic sedimentary rocks.
sedimentary rocks are formed
ice and loose rocks
Sedimentary rocks form as pieces of loose material get pressed or cemented together. The process of forming sedimentary rocks is lithification.
Rocks eroding over time
ice and loose rocks
Rockslides
A large falling movement of loose rocks and soil is called a landslide. This can be triggered by factors such as heavy rainfall, earthquakes, or human activities.