Emma Morano is an Italian supercentenarian who is, at the age of 116 years, 169 days, the world's oldest living person, and the last verified living person to have been born in the 1800s. Born on Nov. 29, 1899, Morano is believed to be the last person living born in the 19th century.
Depending on their size, barrier reefs and atolls can take from 100,000 to 30,000,000 years to fully form. As coral reefs grow, they establish characteristic biogeographic patterns. Click the image for a larger view. All three reef typesfringing, barrier and atollshare similarities in their biogeographic profiles.s the corals grow and expand, reefs take on one of three major characteristic structures fringing, barrier or atoll. Fringing reefs, which are the most common, project seaward directly from the shore, forming borders along the shoreline and surrounding islands.
LOCATION: Coral reefs are generally found in clear, tropical oceans. Coral reefs form in waters from the surface to about 150 feet (45 meters) deep because they need sunlight to survive.The three types of reefs include fringing reefs, barrier reefs, and atolls.eefs need calcium from the water to grow, which is more often available in shallow warm waters. PLANTS: The sun is the source of energy for the coral reef ecosystem. Plant plankton, called phytoplankton, algae and other plants convert light energy into chemical energy through photosynthesis.