Phormidium A genus of filamentous, sheathed cyanobacteria (section III) in which the sheaths tend to coalesce. They are capable of gliding motility (see MOTILE). They are found in all types of aquatic environment, and on wet rocks, damp soil, etc., often forming dense mats. They are frequently difficult to distinguish from Lyngbya and Plectonema (the LPP group).
More From encyclopedia.com
Iron Ores , Rocks Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… Petrography , PETROGRAPHY deals with the systematic description of rocks. The term is sometimes loosely used as synonymous with "petrology, " which, being the broa… Igneous Rocks , Igneous rocks are formed by the cooling and hardening of molten magma. The word igneous comes from the Latin word igneus, meaning fire, and there are… Geode , Geode Geodes are hollow rock masses that are lined with crystals that have grown toward the center of the cavity. Geodes are usually roughly spherica… Metamorphic Rocks , Metamorphic rock is rock that has changed from one type of rock into another. The word metamorphic (from Greek) means “of changing form.” Metamorphic… Aphanitic , Aphanitic Crystalline rocks with mineral grains that cannot be distinguished from one another without magnification have an aphanitic igneous texture…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like