0
What is the purpose of the two gravel layers under the topsoil in Mayan irrigation?
Wiki User
∙ 7y ago
The gravel acts as a drain in wet areas.
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
Which rocks did the Romans use to build roads?
The Roman engineers created roads that went through natural obstacles rather than around them wherever possible. A Roman road consisted of two parallel trenches and a well drained core. Packed small stones were the foundation and the drainage system was the best the ancient world had ever seen. Layers of concrete and cement and concrete gravel made the roads durable. The top layer was made of gravel, packed stones and paving stones.
Why the layers of soil is equal?
the layers ofsoil are equal Becaus the world is equal.
What tools did the Romans use to build roads?
They used a special tool called a GROMA which was made of two sticks with string and a lead weight which helped the Romans to see if the road was straight then they put 2 sticks in the ground to mark were to build the road. They then built the road with different layers one sand and one gravel and one stones they then smoothed it down.
The Mayans believed in a world of three layers which are?
The mayan believed in a world of three layers, they are cheese, mustard and ketchup.
What does a federal government have?
Layers of government
Which soil layers comprise the topsoil?
O horizon and A horizon
Three layers of the soil with picture?
topsoil ,subsoil and bedrock
What layer or layers of soil includes rock particles mixed with dark products of decay?
the answer is TOPSOIL
A gravel is found between two?
A gravel can typically be found between two layers.
What is a vertical picture of all the layers of soil?
topsoil ,subsoil and bedrock.
What are the two layers under the topsoil?
wlla lng hahahhahahah :P
What are all the layers that make up the soil in an area?
The layers of soil in an area are the topsoil, subsoil, weathered rock and bedrock.
How does soil form layers?
Soil is made of 3 main layers: topsoil, subsoil and the layer of parent material. The topsoil contains most of the humus (which is a dark organic material of the soil), it is formed from the decay of various organisms The thick layer of soil below topsoil is subsoil, it is lighter in colour in comparison with the topsoil and often contains a lot of clay. Water carries minerals an other materials down into this layer and most tree roots grow down into the subsoil The bottom layer contains large rocks, this is the material from which the soil above is partly formed. The bottom layer is the parent material, these rocks break down into gravel, sand and clay that become part of the subsoil
What kind of rocks is made from layers os compressed sediments?
Gravel
What are the three layers that form the soil profile?
the answer is topsoil subsoil parent weathering bed rock
What layer layer of soil is the finest?
The topsoil is the finest soil layer. Soil 'layers' are called horizons.
What are the layers of the grassland?
There are usually 4 layers of the rainforest: TOP ----- BOTTOM the emergent layer the canopy layer the under story forest floor
