To derive is defined as to come from, be created from or be developed out of something else. An example of derive is when you get the idea for a new fund raising event based on the event the previous year.
Rubidium: geological information. Rubidium is far too reactive to be found as the free metal in nature. It is relatively rare, although it is the 16th most abundant element in the earth's crust. Rubidium is present in some minerals found in North America, South Africa, Russia, and Canada. It is found in some potassium minerals (lepidolites, biotites, feldspar, carnallite), sometimes with caesium as well.
Cymbidium is a brachiopod genus in the order Pentamerida from Silurian Alaska, from the Cape Phillips Formation from Baillie-Hamilton Island , Arctic Canada and Malaya . See also List of brachiopod genera References Cymbidium, a new genus of Silurian pentameroid brachiopods from Alaska.