In May 1804, the first American expedition the western portion of United States called the Lewis and Clark Expedition started in a city of U.S. state of Missouri called St. Louis. The expedition is also known the Corps of Discovery.
Answer: Group
Explanation:
A Group refers to the amalgamation of minerals from several closely related species. It is done for easier classification and is the third tier in Mineral classification with the first being the <em>Variety</em> of the Mineral, the second being the <em>Species</em> and the third being the <em>Group</em>.
An example of a group is Feldspar which is a group of tectosilicate minerals.
Answer: rhyolite, eclogite, perovskite, stishovite
Explanation: