If the sedimentary rock contains angular gravel sized (> 2mm) sediment it is called a brecciia. If the gravel is rounded it is called a conglomerate.
Conglomerates are dominantly composed of rounded gravel and breccias are composed of dominantly angular gravel.
Rounded pebbles: conglomerate. Angular gravel: breccia.
The particle shape of gravel is typically angular, irregular, and rough. Gravel particles have sharp edges and varying sizes, which allows for good interlocking and stability when used in construction or landscaping applications.
The best gravel for drainage around a house is typically a coarse gravel with angular edges, such as crushed stone or pea gravel. These types of gravel allow for better water flow and help prevent water from pooling around the foundation of the house. It is important to choose a gravel size that is appropriate for the specific drainage needs of the area.
Crushed stone or gravel with angular edges is recommended for use under concrete to provide proper support and stability.
Angular bedload consists of coarse sediment particles, such as gravel and cobbles, that are transported along a riverbed by rolling or sliding. These particles have angular shapes due to their solid and hard composition, which makes them more resistant to abrasion compared to more rounded particles. Angular bedload contributes to the erosion and sediment transport processes in rivers.
Crushed stone or angular gravel is best suited for creating a stable patio base as it provides good drainage and compacts well to support the weight of the patio.
River rock and crushed gravel are both types of gravel but have different shapes and sizes. River rock is typically smooth and rounded, while crushed gravel is crushed and has more angular edges. River rock is often used for decorative landscaping, while crushed gravel is commonly used for driveways and pathways.
Road gravel typically consists of small, angular stones that are varying shades of gray, brown, or beige. It is commonly mixed with sand and fine particles to create a stable surface for roads or driveways. The size and color of road gravel may vary depending on local sources and preferences.
For setting fence posts securely in place, it is recommended to use crushed stone or gravel that is angular in shape and ranges in size from 3/4 inch to 2 inches. This type of gravel provides better stability and drainage for the fence posts.
This type of sedimentary rock is called breccia. Breccia is characterized by its angular-shaped pebbles and fragments that are cemented together by a matrix of smaller particles. It is commonly found in areas where there has been significant tectonic activity or mass wasting processes.