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.
Face swelling is the enlargement or distention of the face due to fluid buildup or inflammation in the facial tissues. Swelling can occur anywhere on the face, but it is most noticeable on the lips, cheeks and eyelids. Swelling can also extend to the neck region. Facial swelling may also be referred to as facial edema. A variety of mild to serious disorders, diseases and conditions can lead to face swelling.
A decrease in the hormone testosterone or an increase in the hormone estrogen cause most cases of breast enlargement in men. These hormone fluctuations can affect infants, children entering puberty, and older men for a variety of reasons.