The protolith may be a sedimentary rock, an igneous rock or another older metamorphic rock. Metamorphic rocks make up a large part of the Earth 's crust and are classified by texture and by chemical and mineral assemblage (metamorphic facies).
The Federal Reserve System (also known as the Federal Reserve, and informally as the Fed) is the central banking system of the United States.he chairman of the Federal reserve bank shall report to the Board of Governors of the Federal Reserve System any such undue use of bank credit by any member bank, together with his recommendation.
1 The Federal Reserve System: Purposes & Functions. An overview of the Federal Reserve System's history, structure, purpose and functions.  The Structure of the Federal Reserve System. An explanation of how the Board of Governors and the 12 Reserve Banks and their Boards of Directors work together.