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The Leonean Orogeny 3.5 to 2.9 billion years ago and the Liberian Orogeny 2.9 to 2.5 billion years ago both influenced the Archean rocks.. Greenstone belts, sequences of metamorphic and volcanic rocks associated with cratons and used by geologists to study early tectonics are found in south-central Liberia, dating to 2.1 billion years ago.
American Association of Petroleum Geologists (AAPG) – Professional geological association American Crystallographic Association American Gem Society ( AGS ), also known as American Gemological Society – American trade association
Seventeen sections, including two outside the United States, were recognized by 1973. On the occasion of the association's twenty-fifth year, twenty-two sections formed the regional units of the association. In 1964, AEG was accepted as a member society of the American Geological Institute. Membership is presently located in 15 countries.
This multiuse regional user template creates a userbox that describes your association with the Republic of Liberia and declares your membership in appropriate regional user categories when placed on your user page.
It is also a member of the Science Council, and is licensed to award Chartered Scientist to qualifying members. The mission of the society is: "Making geologists acquainted with each other, stimulating their zeal, inducing them to adopt one nomenclature, facilitating the communication of new facts and ascertaining what is known in their science ...
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The Mano River Union (MRU) is an international association initially established between Liberia and Sierra Leone by the 3 October 1973 Mano River Declaration. [1] It is named for the Mano River which begins in the Guinea highlands and forms a border between Liberia and Sierra Leone. On 25 October 1980, Guinea joined the union. [2]