What are rock fragments defined as in this context?

In this context, rock fragments are specifically defined as fragments with a diameter of 2 millimeters or more. This classification is key in various fields including geology and soil science because it helps in understanding the composition and behavior of materials in the environment. Larger rock fragments can influence drainage and aeration in soil, impacting the functionality of septic systems.

The distinction between rock fragments and other materials, such as soil particles or organic materials, is important as it helps in assessing the type of soil present in a given area. Smaller particles measuring less than 2 millimeters are generally categorized differently, often as silt or clay, which have distinct properties important for soil health and water retention. Organic materials consist of decomposed plant matter, which plays a role in nutrient cycling but does not fall under the definition of rock fragments. Understanding these classifications helps professionals determine appropriate septic system designs and maintenance for various soil types.