History tends to center on great or near-great presidents. perhaps as much can be learned by examining the administration of a "failed" president, one that historians judge not to have measured up to the office. among frequently mentioned presidents in this category are james buchanan, ulysses grant, calvin coolidge, herbert hoover, and jimmy carter.
examine the presidential career of one of these presidents and write at least one paragraph in summary. what personal flaws seemed to handicap his administration? did he have bad advisors? what major mistakes did he make? why he was originally selected? could he have succeeded under different circumstances?

During metamorphic processes, increased pressure and temperature can affect the of minerals in rock. rocks subjected to very high pressure are typically than others because mineral grains are squeezed together, and the atoms are more closely packed. during metamorphic processes, water facilitates the transfer of ions between and within minerals, which can the rate at which metamorphic reactions take place. the growth of new minerals within a rock during metamorphism has been estimated to be about per million years. metamorphism is commonly associated with convergent plate boundaries, where two plates move toward each other. during contact metamorphism, a large intrusion will contain thermal energy and will cool much more slowly than a small one. metamorphosed sandstone is known as the metamorphic rock made from metamorphosed shale, was once used to make blackboards for classrooms