asthenosphere. The asthenosphere is the ductile part of the earth just below the lithosphere, including the upper mantle. The asthenosphere is about 180 km thick.(Image courtesy of Massey University). Share this page: 1  Facebook. 2  Twitter.he asthenosphere is the ductile part of the earth just below the lithosphere, including the upper mantle. The asthenosphere is about 180 km thick. (Image courtesy of Massey University). Share this page: 1  Facebook. 2  Twitter.
Noun. 1. dirty pool-conduct that is unfair or unethical or unsportsmanlike. behavior, conduct, doings, behaviour-manner of acting or controlling yourself.1  Facebook.2  Twitter.. dirty pool-conduct that is unfair or unethical or unsportsmanlike. behavior, conduct, doings, behaviour-manner of acting or controlling yourself. 1  Facebook. 2  Twitter.
Green algae is the most common and also the easiest to kill. Mustard algae (also known as yellow algae) is commonly mistaken for dirt at the bottom of the pool. This form of algae normally grows on shady areas of the pool and killing it requires an extra chemical such as Yellow Out in addition to chlorine. Black algae is the least common, and also the hardest to remove. Black algae is normally found as coin-sized spots, whose roots are buried deep into the surface of the pool.