You're talking about driveways, right? As in your zoning says you can have either a concrete drive, an asphalt one or a sand & gravel one?
Gravel is crushed rock, and they say "sand and gravel" because gravel almost always has sand in it. Crushed loose bedrock would be fine.
Concrete
Gravel can be both man-made and natural. Natural gravel is formed through the weathering and erosion of rocks over time, typically found in riverbeds, lakes, and other geological formations. Man-made gravel, often referred to as crushed stone, is produced by mechanically crushing larger rocks into smaller fragments for use in construction and landscaping.
The loose covering of weathered rock particles overlying bedrock is called regolith. It consists of a mix of soil, sand, gravel, and other particles that have been broken down over time through weathering processes.
Weathered unconsolidated material on top of solid bedrock is known as regolith. This layer consists of loose particles, such as soil, sand, gravel, and clay, that have been formed through the weathering of the underlying bedrock. Regolith can vary in thickness and composition, depending on the local geology and climate, and plays a crucial role in soil development and ecosystem sustainability.
Gravel is not impermeable. It allows water to pass through due to the spaces between the individual rocks and particles, although the rate of permeability can vary depending on the size and packing of the gravel.
The term for soiled rock beneath the earth's surface soil and gravel is "bedrock."
Aquifers are typically found below the bedrock. Bedrock acts as a barrier that holds the water in the aquifer, with layers of soil, sand, and gravel above the bedrock helping to recharge the aquifer with water.
Concrete
It is usually called bedrock. When bedrock is very close to the surface it is often referred to as ledge.
No. They can only pick up grass, dirt, sand, gravel, etc.
Aquifers form above permeable soil, such as sand or gravel, that allows water to flow easily. Impermeable soils like clay or bedrock will prevent the formation of aquifers.
Yes, gold can be found in gravel deposits. Gold is often found in rivers and streams where it can be eroded from rocks and deposited in the gravel. Extracting gold from gravel typically involves methods like panning or sluicing.
No. Humus is organic matter, and formed over the years as living organisms (mostly plants) die and decompose in the soil. It is about 58% carbon, by weight. Bedrock can decompose, too, but it never becomes humus. Depending on the type of bedrock, it breaks down into sand, silt, gravel and clay minerals. Limestone bedrock may dissolve.
Gravel is made by crushing rock and sorting the result into different sizes, generally by screening. Your pea gravel is one of the screening products. There are several rock-crushing systems, and these give a different range of sizes in the product. There are hammer mills, rod mills, 'rod and cone' mills, and so on. A gravel producer would choose his process according to need. In many parts of the country, merely sorting the river gravels will be a suitable process - provided the source rocks are themselves suitable.
No, gravel and conductor are not the same. Gravel is a loose aggregation of small rock fragments, while a conductor is a material that allows the flow of electricity.
Alberta, Canada GC1R5CM The Slate Rock and Gravel Company (Traditional Cache) in Alberta, Canada created by 32_Hawkeye and his two Bam Bams The Slate Rock and Gravel Company A cache by 32_Hawkeye and his two Bam Bams Message this owner
If composting follows proper procedure, then it'll be the organic matter called humus in 21 days to a year. The amount of time depends on the turning. A minimum of a turn each day should give the desired results in less than a month.But this assumes that bedrock and gravel will be left to natural weathering processes. However, mechanical means of pulverizing bedrock and gravel would be faster than breaking compostable materials down into humus, for use as a soil amendment, fertilizer or mulch.