They were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe that lives today in a wide range of environments ranging from the shallow shelf to lakes, rivers, and even soils.urface is covered by a felt of cyanobacterial filaments that trap sediment grains that are washed across the mat surface. Abundant sediment supply produces granular laminae, low sediment supply produces layers rich in organic matter (green in drawing).
A seraglio (/ s É Ë r Ã¦ l j oÊ / sÉ-RAL-yoh or / s É Ë r ÉË l j oÊ / sÉ-RAHL-yoh) or serail is the sequestered living quarters used by wives and concubines in an Ottoman household. The term harem is a generic term for domestic spaces reserved for women in a Muslim family, which can also refer to the women themselves.
Word origin of 'serac' C19: from Swiss French: a variety of white cheese (hence the ice that it resembles) from Medieval Latin serÄcium, from Latin serum whey sÃ©rac in American