Search results
Results from the WOW.Com Content Network
The Iberian Peninsula is in the south west of Europe and located near North Africa, and as a result, saw the arrival from both regions of many types of plant species, including wetland thermophilic plant species (those that require a great deal of heat), xerophilic plants (those that require a dry climate), orophilic (sub-alpine) plants, boreo ...
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.
A state soil is a soil that has special significance to a particular state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These official state soils share the same level of distinction as official state flowers and birds .
The name is said to come from the word bajareque, is an old Spanish term for walls made of bamboo (guadua in Spanish) and soil. Guadua is a common woody grass found in Colombia. [ 1 ] While its exact origin is uncertain, some authors have also attributed it to Caribbean-Taino culture and written it as 'bajareque'.
Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates: sand, silt, and clay. At the next larger scale, soil structures called peds or more commonly soil aggregates are created from the soil separates when iron oxides , carbonates , clay, silica and humus , coat particles and ...
The Llanos (Spanish Los Llanos, "The Plains"; Spanish pronunciation: [los ˈʝanos]) is a vast tropical grassland plain situated to the east of the Andes in Colombia and Venezuela, in northwestern South America.
The molluscs are calcareous organisms, as are the calcareous sponges , that have spicules which are made of calcium carbonate. [ 1 ] Additionally, reef-building corals, or Scleractinia , are calcareous organisms that form their rigid skeletal structure through the precipitation of aragonite ( i.e. , a polymorph of calcium carbonate).
The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt):