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2. Crushed stone - Wikipedia

   en.wikipedia.org/wiki/Crushed_stone

   Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel , which is produced by natural processes of weathering and erosion and typically has a more rounded shape.

3. Rock garden - Wikipedia

   en.wikipedia.org/wiki/Rock_garden

   The standard layout for a rock garden consists of a pile of aesthetically arranged rocks in different sizes, with small gaps between in which plants are rooted. Typically, plants found in rock gardens are small and do not grow larger than 1 meter in height, [ 12 ] though small trees and shrubs up to 6 meters may be used to create a shaded area ...

4. Gravel - Wikipedia

   en.wikipedia.org/wiki/Gravel

   Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.

5. Fieldstone - Wikipedia

   en.wikipedia.org/wiki/Fieldstone

   A chain-driven wheel rotates a graded scoop, picking surface rocks from the soil, and shakes off excess soil. A hydraulic lift then tilts and empties the rock bucket, usually along the perimeter of the farm. Washed and split, field rock is considered an attractive landscape and building material, and can be expensive at building supply stores.

6. Trap rock - Wikipedia

   en.wikipedia.org/wiki/Trap_rock

   Other uses include gardening and landscaping, for the production of millstones, for the production of mineral wool, as a flux in ceramic masses and glazes, for the production of glass ceramics, crushed as a filter aggregate (air filtration of poison gas) in ABC bunkers, as filter bed material at water treatment facilities, and ground as a soil ...

7. Caliche - Wikipedia

   en.wikipedia.org/wiki/Caliche

   Caliche fossil forest on San Miguel Island, California. Caliche (/ k ə ˈ l iː tʃ iː /) (unrelated to the street-slang "Caliche" spoken in El Salvador) is a soil accumulation of soluble calcium carbonate at depth, where it precipitates and binds other materials—such as gravel, sand, clay, and silt.