page_title: Siliceous ooze
hierarchical_section_title: Siliceous ooze
caption_attribution_description: 160x magnified, stacked image, bright field (negative image) Fundort / Site: Barbados (sediment sample) Alter / Age: fossil (Middle Eocene to Oligocene) Präparation / Preparation: Andreas Drews, 2015
context_page_description: Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Siliceous oozes are the least common of the deep sea sediments, and make up approximately 15% of the ocean floor. Oozes are defined as sediments which contain at least 30% skeletal remains of pelagic microorganisms. Siliceous oozes are largely composed of the silica based skeletons of microscopic marine organisms such as diatoms and radiolarians. Other components of siliceous oozes near continental margins may include terrestrially derived silica particles and sponge spicules. Siliceous oozes are composed of skeletons made from opal silica Si, as opposed to calcareous oozes, which are made from skeletons of calcium carbonate organisms. Silica is a bioessential element and is efficiently recycled in the marine environment through the silica cycle. Distance from land masses, water depth and ocean fertility are all factors that affect the opal silica content in seawater and the presence of siliceous oozes.
context_section_description: Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Siliceous oozes are the least common of the deep sea sediments, and make up approximately 15% of the ocean floor. Oozes are defined as sediments which contain at least 30% skeletal remains of pelagic microorganisms. Siliceous oozes are largely composed of the silica based skeletons of microscopic marine organisms such as diatoms and radiolarians. Other components of siliceous oozes near continental margins may include terrestrially derived silica particles and sponge spicules. Siliceous oozes are composed of skeletons made from opal silica Si(O₂), as opposed to calcareous oozes, which are made from skeletons of calcium carbonate organisms (i.e. coccolithophores). Silica (Si) is a bioessential element and is efficiently recycled in the marine environment through the silica cycle. Distance from land masses, water depth and ocean fertility are all factors that affect the opal silica content in seawater and the presence of siliceous oozes.
caption: A radiolarian, 160x magnified
exif: {"Image ImageWidth": "1700", "Image ImageLength": "2550", "Image BitsPerSample": "[16, 16, 16]", "Image Compression": "Uncompressed", "Image PhotometricInterpretation": "2", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "72", "Image YResolution": "72", "Image PlanarConfiguration": "1", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS5.1 Macintosh", "Image DateTime": "2016:09:30 00:08:50", "Image ExifOffset": "256", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "394", "Thumbnail JPEGInterchangeFormatLength": "7655", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "1700", "EXIF ExifImageLength": "2550"}