Rock Units. A lithostratigraphic unit is defined as a body of sedimentary, extrusive igneous, metasedimentary, or metavolcanic strata which is distinguished on the basis of lithologic characteristics and stratigraphic position (position in the rock sequence).The smallest lithostratigraphic rock unit is the bed.edimentary environments that started out side-by-side will end up overlapping one another over time due to sea level change (transgressions and regressions). The result is a vertical sequence of beds. The vertical sequence of facies mirrors the original lateral distribution of sedimentary environments.
The US Supreme Court, as an institution, is head of the Judicial Branch. The Chief Justice of the United States presides over the Court and is the head of the judiciary during his (or her) tenure, but the Associate Justices don't really play a leadership role.
History US Government. The leader of the Executive Branch is the President of the United States. The President holds all the power for this branch of the government and the other members report to the President.Other parts of the Executive branch include the Vice President, the Executive Office of the President, and the Cabinet.The President. The President is seen as the leader of the US Government and is both the head of state and the Commander-in-Chief of the US armed forces.istory US Government. The leader of the Executive Branch is the President of the United States. The President holds all the power for this branch of the government and the other members report to the President.