Just woundering... any answers?
2007-01-10 05:07:25 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Soils are formed from the "in-place" weathering of bedrock or other natural sediment deposits that are exposed to the atmosphere (i.e. soils do not develop underwater). It is important to note the "in-place" portion of the definition. Deposits consisting of sediment laid down by water are called "alluvium" and those that are transported and laid down by gravity are called colluvium or landslide debris (depending on how fast they moved). Soils result from the penetration of water and plant roots which serve to break up and loosen the bedrock or other material, which in turn allows more water and deeper root penetration, etc. This also allows for a build up of organic material which is another charateristic of soils.
2007-01-10 05:51:10 · answer #1 · answered by B.O. 2 · 1⤊ 0⤋
Soils are formed by erosion of the underlying rock. They may also be deposited by a river - 'alluvial soils', or by the wind - 'loess', or as a result of volcanic eruption (often very fertile which is why farmers will till soild very near to volcanoes without a thought for the danger). The colour depends on what kind of rock they were formed from.
2007-01-10 13:18:02 · answer #2 · answered by rdenig_male 7 · 1⤊ 0⤋
They are different from one place to another so they can plant different foods everywhere. And so people can work TOGETHER to get all kinds of food to stay healthy. God knew what he created for reasons.
But apparently I don't know how they are formed.
2007-01-10 13:15:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋