Middle ear to sounds of higher frequency, because these are better taken up by the inner ear (which also responds to higher frequencies than those of non-mammals). The malleus, or "hammer", evolved from the articular bone of the lower jaw, and the incus, or "anvil", from the quadrate. In other vertebrates, these bones form the primary jaw joint, but the expansion of the dentary bone in mammals led to the evolution of an entirely new jaw joint, freeing up the old joint to become part of the ear. For a period of time, both jaw joints existed together, one medially and one
Anvil Mining would lead to reviews of the agreements related to Anvil's projects at Kinsevere and Mutoshi Mine. Anvil Mining Anvil Mining is a copper producer that has been operating in the Democratic Republic of the Congo (DRC) since 2002. The company headquarters are in Montreal, Quebec, Canada. Anvil is listed on the Toronto Stock Exchange and the Australian Stock Exchange. As of September 2011 its major shareholder was Trafigura Beheer. Anvil Mining operated the Dikulushi Mine near Kilwa, Katanga. In October 2004 there was a small-scale uprising in Kilwa which was brutally suppressed by FARDC soldiers of the 62nd Brigade. Anvil