Ads
related to: are sponge rooms guaranteed to fit in glass tile backsplash in kitchen
Search results
Results from the WOW.Com Content Network
Glass was used in mosaics as early as 2500 BC, but it was not until the 3rd century BC that innovative artisans in Greece, Persia, and India created glass tiles.. Whereas clay tile is dated as early as 8,000 BC, there were significant barriers to the development of glass tile, including the high temperatures required to melt glass and the complexities of annealing glass curves.
Glass sponges (Hexactinellids) have different body plans than other members of the Metazoan because the adult tissue is made up of a single giant multinucleated syncytium. This multinucleated syncytium creates the inner and outer layers of the sponge and is connected to uninucleate cellular regions by cytoplasmic bridges. [ 7 ]
Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed siliceous spicules, often referred to as glass sponges. They are usually classified along with other sponges in the phylum Porifera , but some researchers consider them sufficiently distinct to deserve their own phylum, Symplasma .
Sponge reefs are reefs produced by sea sponges. All modern sponge reefs are formed by hexactinellid sponges, which have an endoskeleton made of silica spicules and are often referred to as "glass sponges", while historically the non-spiculed, calcite-skeletoned archaeocyathid and stromatoporoid sponges were the primary reef-builders.
Prior to their discovery in 1987, glass sponge reefs were believed to have been extinct worldwide since the end of the Jurassic period. [1] The formation of glass sponge reefs requires a combination of unique geological conditions combined with the occurrence of the reef-forming species of Hexactinellid sponges.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Ads
related to: are sponge rooms guaranteed to fit in glass tile backsplash in kitchen