Glossary Q

Quercus is the botanical genus to which oak belongs. The wine industry gets its oak form Quercus alba for American oak barrels, Quercus robur for European oak barrels, and Quercus suber for the bark used in making corks.

Quarry is described as an open pit or excavation from which stone is taken by cutting, digging or blasting.

Quebracho refers to (1) A tree in South America from which tannin is extracted and (2) A thinning agent, tannin, used in drilling muds.

-see also:
"Quebracho" is in the HS Code "3201.10"
  - - Quebracho extract

Quaternary refers to the period of Earth's history from about 2 million years ago to the present; also, the rocks and deposits of that age. Quaternary refers also to a geologic period that occurred roughly 1.6 million years ago to today. During much of this period continental glaciers in the Northern Hemisphere covered large regions of land surface in the high and mid-latitudes. Homo sapiens appear about 200,000 years BP (before present) and become the first species to alter the Earth's environment on a large-scale.

-see also:
"Quaternary" is in the HS Code "2923"
  Quaternary Ammonium Salts And Hydroxides ; Lecithins And Other Phosphoaminolipids

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