Information: - The Triassic is a geologic period and system which spans 50.9 million years from the end of the Permian Period million years ago (Mya), to the beginning of the Jurassic Period Mya. The Triassic is the first period of the Mesozoic Era. Both the start and end of the period are marked by major extinction events. The Triassic was named in 1834 by Friedrich von Alberti, after the three distinct rock layers ("tri" meaning "three") that are found throughout Germany and northwestern Europered beds, capped by marine limestone, followed by a series of terrestrial mud- and sandstonescalled the "Trias". - The Early Jurassic epoch (in chronostratigraphy corresponding to the Lower Jurassic series) is the earliest of three epochs of the Jurassic period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma(million years ago), and ends at the start of the Middle Jurassic 174.1Ma. - The Toarcian is, in the ICS' geologic timescale, an age or stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. - The term Toarcian turnover , alternatively the Toarcian extinction , the Pliensbachian - Toarcian extinction , or the Early Jurassic extinction , refers to the wave of extinctions that marked the end of the Pliensbachian stage and the start of the Toarcian stage of the Early Jurassic period , c. 183 million years ago . The Toarcian turnover was most strongly manifested in aquatic lifeforms , notably in mollusk groups like ammonites . Its reach was global in extent , as evidenced by research in European ( peninsula of Peniche , Portugal ) and Japanese waters , the Andean basin , the floor of the former Tethys Sea . Evidence points to anoxic bottom waters as the probable cause of these marine extinctions , linked in turn to the massive volcanism of the Karoo - Ferrar eruptions in the relevant era . - In the geologic timescale, the Sinemurian is an age or stage in the Early or Lower Jurassic epoch or series. It spans the time between 199.3 2 Ma and 190.8 1.5 Ma (million years ago). The Sinemurian is preceded by the Hettangian and is followed by the Pliensbachian. - Chronostratigraphy is the branch of stratigraphy that studies the age of rock strata in relation to time. - The Aalenian is a subdivision of the Middle Jurassic epoch/series of the geologic timescale that extends from about 174.1 Ma to about 170.3 Ma (million years ago). It was preceded by the Toarcian and succeeded by the Bajocian. - The Jurassic (from Jura Mountains) is a geologic period and system that spans 56.3 million years from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period Mya. The Jurassic constitutes the middle period of the Mesozoic Era, also known as the Age of Reptiles. The start of the period is marked by the major TriassicJurassic extinction event. Two other extinction events occurred during the period: the Pliensbachian/Toarcian event in the Early Jurassic, and the Tithonian event at the end; however, neither event ranks among the "Big Five" mass extinctions. - The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174 to 163 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger. This name in the past was also used to indicate the Middle Jurassic epoch itself, but is discouraged by the IUGS, to distinguish between rock units and units of geological time. - The Pliensbachian is an age of the geologic timescale or stage in the stratigraphic column. It is part of the Early or Lower Jurassic epoch or series and spans the time between 190.8 1.5 Ma and 182.7 1.5 Ma (million years ago). The Pliensbachian is preceded by the Sinemurian and followed by the Toarcian. 'toarcian turnover' is related to which object entity through the relation of 'instance of'? Choices: - 1 - age - branch - column - era - event - extinction - extinction event - name - period - relation - series - stage - subdivision - three - time
extinction event
Question: Information: - A brigade is a major tactical military formation that is typically composed of three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division. - The Assistant Commandant of the Marine Corps (ACMC) is the second highest-ranking officer in the United States Marine Corps, and serves as a deputy for the Commandant of the Marine Corps (CMC). Before 1946, the title was known as Assistant to the Commandant. - Headquarters Marine Corps (HQMC) is a headquarters staff within the Department of the Navy which includes the offices of the Commandant of the Marine Corps, the Assistant Commandant of the Marine Corps and various staff functions. The function, composition, and general duties of HQMC are defined in Title 10 of the United States Code, Subtitle C, Part I, Chapter 506 (Headquarters, Marine Corps). - Michael K. Sheridan is a retired Brigadier General in the U.S. Marine Corps . His last post was to serve as the Director of Policies and Operations Department , Headquarters Marine Corps in Washington , D.C. . Prior to that position he served as Director of Facilities and Services Division at Headquarters Marine Corps . Sheridan also served as Deputy Commanding General for the Marine Corps Recruit Depot , located at Parris Island , South Carolina . - Brigadier general (abbreviated Brig. Gen.) is a senior rank in the armed forces. It is the lowest ranking general officer in some countries, usually sitting between the ranks of colonel and major general. When appointed to a field command, a brigadier general is typically in command of a brigade consisting of around 4,000 troops (four battalions). In some countries a brigadier general is informally designated as a one-star general (OF-6). - A general officer is an officer of high rank in the army, and in some nations' air forces or marines. - The Commandant of the Marine Corps (CMC) is normally the highest-ranking officer in the United States Marine Corps and is a member of the Joint Chiefs of Staff. The CMC reports directly to the United States Secretary of the Navy and is responsible for ensuring the organization, policy, plans, and programs for the Marine Corps as well as advising the President, the Secretary of Defense, the National Security Council, the Homeland Security Council, and the Secretary of the Navy on matters involving the Marine Corps. Under the authority of the Secretary of the Navy, the CMC designates Marine personnel and resources to the commanders of Unified Combatant Commands. The Commandant performs all other functions prescribed in Section 5043 in Title 10 of the United States Code or delegates those duties and responsibilities to other officers in his administration in his name. As with the other joint chiefs, the Commandant is an administrative position and has no operational command authority over United States Marine Corps forces. 'michael k. sheridan' is related to which object entity through the relation of 'military branch'? Choices: - army - navy - regiment - united states marine corps
Answer:
united states marine corps