In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: Schilling's ridge-sink model describes phenomena here, and convection cells here exhibit "soft turbulence. " The carrot shape of kimberlite pipes owes to their origin in this region. Studies of mid-ocean-ridge basalts suggest its convection occurs only in two layers. This structure may contain a post-perovskite phase where P-waves attenuate in its D-double-prime layer. A velocity discontinuity in this region is named for Inge Lehmann. Its upper limit is named for Mohorovicic [moh-oh-ROH-vee-chihch], which separates its uppermost layer, the asthenosphere, from the crust. For 10 points, name this plastic layer of the earth's interior between crust and core.
A:
Science